Based on my real life experience I think the answers are both YES and NO.
Proof for YES: Vietnamese people as a whole (no matter pro- or anti-Chinese fraction ) look down upon people around us who do not practice Sinospheric cultures (such as Thai, Lao, Cambodia, Indonesia, Philippine and aboriginal Vietnamese), label them barbarians. This is so common that people are not even aware of the fact that calling others barbarians is so Sinopheric.
At the elite level (also both pro and anti-Chinese), the learned class emphasizes a lot about national pride and the importance of education and cultivation of manner and intellect. They speak fervently about how to reform Vietnam politically, economically and culturally. Pro-Chinese may suggest go back to Confucianism as a solution (imitating Japan, Korea) while anti-Chinese state that severing all ties with Sinospheric culture is a prerequisite. Ironically the kinds of above mentalities that permeate these elites are so deeply rooted in Sinospheric cultures.
Proof of NO: Only Vietnamese who have the privilege of going abroad are aware of the thing call Sinosphere. This may bring them a shock, similar to the shock our early 20th forefathers got when they learnt the modern concepts of nations and peoples: So if our culture is just an offshoot of Chinese culture what is there to be proud of, especially with the anti-Chinese rhetoric so pervasive both domestically as well as among overseas Vietnamese. So people in Vietnam feel proud of their culture but are less aware of their culture roots while some overseas Vietnamese may adopt the stand of severing ties with Sinospheric culture if they choose to do so.
What people may not realize is that anti-Chinese attitude is not always the norm in Vietnam history. During the most anti-China (not Chinese culture) historical period, the Le and Nguyen dynasties adopted Chinese bureaucratic system and intensified Sinification of Vietnam society. Even when the French injected new concepts of nations and peoples into the Vietnamese elites in early 20th century, Sinophobia was still not the norm. During Vietnam war, the common Northern people were very well aware of the material support that Chinese government gave the North Vietnam government and many people still talk about that with gratefulness. In the beginning of relationship normalization, Vietnam TV was (an today still) flooded with Chinese movies such as Journal to the West, Dream of the Red Chamber…etc. Vietnamese people traveling to China marveled at the speed of modernization in China and were very eager to replicate. These things happened at the same time when anti-China sentiment was still pervasive in the literature, causing Western people to describe a Love Hate relationship between China and Vietnam.
Recent development in Vietnam is the result of both China’s actions in South China Sea as well as the economic crisis that Vietnam is going through.
From my point of view, since genetic evidence has already showed that most North East Asian and South East Asian share the same roots somewhere in China, there is no need to pay heed to Chinese nationalistic claims about Chinese culture. The making of China civilization is now being deconstructed and China turns out not a special case anymore than other ancient civilizations such as Egyptian, Greek and Roman. The unity and continuity of Chinese civilization may not be what Chinese often claim or want others to believe. Vietnam culture inherited a lot from Han culture. Japan inherited its culture from the Tang’s while Korea adopted Song and Ming cultures. And we can say that modern day China inherit its culture from the Qing. This is very clear since if you wear qipao/cheongsam (Qing dynasty dress) people will say you love Chinese culture but they will not do so if someone wears a kinomo (a derivative of Tang dress) or a Vietnam ao-tu-than (a derivative of Han dress).
References:
Ngô Bảo Châu - Wikipedia Elites like Ngo are heavily involved in promoting educational reforms in Vietnam
Phan Bội Châu - Wikipedia the prominent figure that promoted Westernization of Vietnam society in early 20th century. People who advocating severing ties with Chinese culture draw their inspiration from him
Beyond the Yellow River: How China Became China New perspectives on the making of Chinese civilization
Social Memory and State Formation in Early China by Min Li Another new perspective on the making of Chinese civilzation
Popular CCTV TV shows about archeological treasures of Chinese civilization
6. Immense popularity of Chinese classic movies among Vietnamese netizens (look at view counts)
7. https://danviet.vn/dep/gioi-tre-dua-nhau-dien-suon-xam-don-trung-thu-som-623086.html This may cause angry feeling in anti-China Vietnamese
8. https://news.zing.vn/si-tu-chen-chan-cau-may-o-van-mieu-post432153.html
but this is widely approved by the majority of Vietnamese