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
khoa hoc » hoa hoc
cac nhan » ca nhan, cac nha, cam nhan
nhan dan » phan dau, gian dan, nhan tai
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi cac » hoc cac, voi cac, hoa cac
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: ((te sach) OR (toc sach)) doi tap, nghien cuu mon hoc nganh khoa hoc ma hoi cac nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) doi tap, nghien cuu mon hoc nganh khoa hoc ma hoi cac nhan dan*".