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, danh hoc
manh hon » manh ho, minh hon, manh huong
cac cong » cua cong
cong hoa » dong hoa, dong hoc, hang hoa
hoa phan » hoa dan, co phan
cung hoc » chung hoc, dung hoc, vung hoc
hoc bai » hoc dai, hoc giai
bai hoi » bai choi, bai hoc, dai 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) or (manh hon)) tap, nghien cac cong hoa phan cung hoc bai hoi va luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((manh hoc) OR (manh hon)) tap, nghien cac cong hoa phan cung hoc bai hoi va luan van.
• Adding a wildcard symbol may retrieve word variants: tu ((manh hoc) or (manh hon)) tap, nghien cac cong hoa phan cung hoc bai hoi va luan van*.