Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh khoa » nganh hoa, nganh khong, doanh khoa
cach thuc » anh thuc, cac thu
thuc thai » thuc pham, toc thai, thuc thuc
hoc nganh » hoc nhanh
thu cach » thuc cach, thu canh, tu cach
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
phan van » pham van, thanh van, luan van
ma hoi » mai hoi, xa hoi, ma hoa
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu cach thuc thai, nghien cac cong hoc nganh khoa hoc ma hoi ca ((phan van) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cach thuc thai, nghien cac cong hoc nganh khoa hoc ma hoi ca ((phan van) OR (thanh san)).
• Adding a wildcard symbol may retrieve word variants: thu cach thuc thai, nghien cac cong hoc nganh khoa hoc ma hoi ca ((phan van) or (thanh san))*.