Perhaps you should try some spelling variations:
doanh khoa » toan khoa
cach thuc » anh thuc, cac thu
hoc doanh » hoa doanh, hoc danh, hoc dan
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
tu cach » tu cac
hoi cac » hoc cac, voi cac, hoa cac
nhan va » nhan tai, nhan tao, phan van
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thuc pham, nghien cuu tong hoc doanh khoa hoc ma hoi cac ((nhan va) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thuc pham, nghien cuu tong hoc doanh khoa hoc ma hoi cac ((nhan va) OR (nhan dan)).
• Adding a wildcard symbol may retrieve word variants: tu cach thuc pham, nghien cuu tong hoc doanh khoa hoc ma hoi cac ((nhan va) or (nhan dan))*.