Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
hoc sach » hoc sinh, hoc cac
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
hoc anh » hoc nhanh, ngoc anh, hoc sinh
doi tap » doi tac, doi dap, doi tai
va nhan » van nhan, ca nhan, va phan
mo hoc » mon hoc, co hoc
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: ((hoc sach) OR (hoc anh)) doi tap, nghien cuu mo hoc nganh khoa hoc ma hoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc anh)) doi tap, nghien cuu mo hoc nganh khoa hoc ma hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc anh)) doi tap, nghien cuu mo hoc nganh khoa hoc ma hoi va nhan dan*.