Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
manh hoc » anh hoc, manh ho, manh hon
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
hoc phan » hoc dan, hoc pho
cung hoc » chung hoc, vung hoc, ung hoc
dung hoc » dong hoc, dung thuoc, trung hoc
tu manh » tu minh, tu hanh, vu manh
mai hoi » mai khoi, dai hoi, lai hoi
va luan » vay luan, van luan, va quan

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 cong hoc phan ((cung hoc) OR (dung hoc)) mai hoi va luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu manh hoc tap, nghien cac cong hoc phan ((cung hoc) OR (dung hoc)) mai hoi va luan van".
• Adding a wildcard symbol may retrieve word variants: tu manh hoc tap, nghien cac cong hoc phan ((cung hoc) OR (dung hoc)) mai hoi va luan van*.