Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep bac
nghiep cay » nghiep chan, nghiep va, nghiep cua
phan cung » phan cong, phan ung, phan xuong
manh hoc » anh hoc, manh ho, manh hon
dong hoc » dong co, dong luc
hoc phan » hoc dan, hoc pho
cung hoc » chung hoc, dung hoc, vung hoc
van luan » van quan, van tuan, von luan
tu manh » tu minh, tu hanh, vu manh
hoc bai » hoc dai, hoc giai
bai hoi » bai choi, bai hoc, dai hoi
hoi van » hoi va, hoi dan, hai 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 manh hoc tap, ((nghien cac) OR (nghiep cay)) dong hoc phan cung hoc bai hoi van luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu manh hoc tap, ((nghien cac) OR (nghiep cay)) dong hoc phan cung hoc bai hoi van luan van".
• Adding a wildcard symbol may retrieve word variants: tu manh hoc tap, ((nghien cac) OR (nghiep cay)) dong hoc phan cung hoc bai hoi van luan van*.