Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
toc sach » hoc sach, doc sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
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
phan van » pham van, thanh van, luan 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: toc sach hoc tap, nghien cuu tong hoc nganh khoa hoc ma hoi va ((nhan dan) or (phan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach hoc tap, nghien cuu tong hoc nganh khoa hoc ma hoi va ((nhan dan) OR (phan van)).
• Adding a wildcard symbol may retrieve word variants: toc sach hoc tap, nghien cuu tong hoc nganh khoa hoc ma hoi va ((nhan dan) or (phan van))*.