Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hanh hoc » thanh hoc, hinh hoc, anh hoc
cong cac » cuong cac, cong tac, cong cau
cac toan » cac khoan, hach toan, cac thanh
khoa hoc » hoa hoc
nhan van » nhan dan, nhan va, phan van
tu hanh » du hanh, lu hanh, thuc hanh
hoc dai » hoc dan
mai van » hai van, mai quan, thai van

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu hanh hoc tap, nghien thu cong cac toan khoa hoc dai ((mai van) or (mai va)) nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hanh hoc tap, nghien thu cong cac toan khoa hoc dai ((mai van) OR (mai va)) nhan van.
• Adding a wildcard symbol may retrieve word variants: tu hanh hoc tap, nghien thu cong cac toan khoa hoc dai ((mai van) or (mai va)) nhan van*.