Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
nganh cong » nhanh chong, thanh cong
hoc nganh » hoc nhanh
phan van » pham van, thanh van, luan van
cong hoc » dong hoc, cong hoa, cong coc
cau phan » chau phan, cuu phan, cac phan
thu sach » thuat sach, thuoc sach, thu hoach
khoa cau » khoa chau, khoa cam, hoa cau
xa khoa » da khoa, bia khoa, tai khoa
tu sach » su sach, te sach, tu cach
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
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)) hoc tap, nghien huu mot hoc nganh cong hoc xa khoa cau phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) hoc tap, nghien huu mot hoc nganh cong hoc xa khoa cau phan van".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) hoc tap, nghien huu mot hoc nganh cong hoc xa khoa cau phan van*.