Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
thu sach » thuat sach, thuoc sach, thu hoach
khoa hoc » hoa hoc
cac luan » cac luat, sach luan, cac dan
tu sach » su sach, te sach, tu cach
doi tap » doi tac, doi dap, doi tai
hoi cac » hoc cac, voi cac, hoa 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) OR (thu sach)) doi tap, nghien cuu mo hoc nganh khoa hoc xa hoi cac luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) doi tap, nghien cuu mo hoc nganh khoa hoc xa hoi cac luan van".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) doi tap, nghien cuu mo hoc nganh khoa hoc xa hoi cac luan van*.