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
chau pham » cau pham, chau phan, che pham
sach hoc » sach hoi, mach hoc, sach duoc
cach hoc » cach thuc, cach thoi, dich hoc
huu dong » huy dong, luu dong, huu dung
dong hoc » dong co, dong luc
cong hoc » cong hoa, cong coc, cong ho
hoi chau » hoi chu, hoi cham, hai chau
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 hoc) OR (cach hoc)) tap, nghien huu dong hoc nganh cong hoc xa hoi chau pham van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach hoc) OR (cach hoc)) tap, nghien huu dong hoc nganh cong hoc xa hoi chau pham van".
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) OR (cach hoc)) tap, nghien huu dong hoc nganh cong hoc xa hoi chau pham van*.