Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
nganh cong » nhanh chong, thanh cong
cach thuc » anh thuc, cac thu
hoc nganh » hoc nhanh
cac thoi » cac toi, cac hop, cac tro
huu toan » huu tuan, cuu toan, huy toan
toan hoc » toan khoa, van hoc, hoa hoc
cong hoc » dong hoc, cong hoa, cong coc
phap dau » phan dau, phap day, pham dau
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
va phap » va phat, ban phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((cac thoi) or (cach thuc)) tap, nghien huu toan hoc nganh cong hoc mai hoi va phap dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cac thoi) OR (cach thuc)) tap, nghien huu toan hoc nganh cong hoc mai hoi va phap dau.
• Adding a wildcard symbol may retrieve word variants: tu ((cac thoi) or (cach thuc)) tap, nghien huu toan hoc nganh cong hoc mai hoi va phap dau*.