Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
phan cung » phan cong, phan ung, phan xuong
manh hoc » anh hoc, manh ho, manh hon
cac dong » cac duong, cac cong, cac dang
dong hoc » dong co, dong luc
hoc phan » hoc dan, hoc pho
van luan » van quan, van tuan, von luan
tu manh » tu minh, tu hanh, vu manh
hoc bai » hoc giai
hoc dai » hoc dan
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 dong hoc phan cung ((hoc bai) or (hoc dai)) hoi van luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu manh hoc tap, nghien cac dong hoc phan cung ((hoc bai) OR (hoc dai)) hoi van luan van.
• Adding a wildcard symbol may retrieve word variants: tu manh hoc tap, nghien cac dong hoc phan cung ((hoc bai) or (hoc dai)) hoi van luan van*.