Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach doi » sach hoi, sach moi, sach dao
khoa hoc » hoa hoc
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
hoi cac » hoc cac, voi cac, hoi bac
hoa cac » hoa chat, chon cac
mo hoc » mon hoc, co hoc
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach doi tap, nghien cuu mo hoc nganh khoa hoc xa ((hoi cac) OR (hoa cac)) luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach doi tap, nghien cuu mo hoc nganh khoa hoc xa ((hoi cac) OR (hoa cac)) luan van".
• Adding a wildcard symbol may retrieve word variants: tu sach doi tap, nghien cuu mo hoc nganh khoa hoc xa ((hoi cac) OR (hoa cac)) luan van*.