Perhaps you should try some spelling variations:
nganh trung » thanh trung, manh trung, danh trung
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
trung hoa » trung hoc, trung ha
thoi tap » toi tap, hoc tap, thoi dai
cong hoc » dong hoc, cong hoa, cong coc
nhan dan » phan dau, gian dan, nhan tai
tu cach » tu cac
hoa may » hoc may
hai van » thai van, ha van, hai tan

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien thu cong hoc nganh trung hoa may ((hoi va) OR (hai van)) nhan dan~.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien thu cong hoc nganh trung hoa may ((hoi va) or (hai van)) nhan dan*.