Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nghiep vu » nghiep va
cuong cac » luong cac, cong cac, trong cac
cac thanh » bac thanh, cach nhanh, ban thanh
cong hoc » dong hoc, cong hoa, cong coc
van luan » van quan, van tuan, von luan
tin hoc » sinh hoc
hai van » thai van, ha van, hai tan
tu tin » thu tin, tu tieng, tru tinh
ma hai » ta hai, va hai, xa hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tin hoc tap, ((nghien cac) or (nghiep vu)) cuong cac thanh cong hoc ma hai van luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tin hoc tap, ((nghien cac) OR (nghiep vu)) cuong cac thanh cong hoc ma hai van luan van.
• Adding a wildcard symbol may retrieve word variants: tu tin hoc tap, ((nghien cac) or (nghiep vu)) cuong cac thanh cong hoc ma hai van luan van*.