Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
cong luat » cong suat, cong luan, cuong luan
hanh hoc » thanh hoc, hinh hoc, anh hoc
cac cong » cua cong
hoan hoc » toan hoc, hoang hoa, khoan hoi
phan van » pham van, thanh van, luan van
lu hanh » luu hanh, du hanh, ly hanh
mai hoi » mai khoi, dai hoi, lai hoi
va phan » van phan, va phat, va phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: lu hanh hoc tap, nghien cac cong luat doanh ((hoan hoc) or (hoa hoc)) mai hoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lu hanh hoc tap, nghien cac cong luat doanh ((hoan hoc) OR (hoa hoc)) mai hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: lu hanh hoc tap, nghien cac cong luat doanh ((hoan hoc) or (hoa hoc)) mai hoi va phan van*.