Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
sach hoc » cach hoc, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
cu nganh » cua nganh, cau nganh, chuc nganh
cong hoc » dong hoc, cong hoa, cong coc
phan dau » phan tu, hang dau
cong cu » chung cu
ca phan » cac phan, cao phan, cap phan
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach hoc) or (sach hoi)) tap, nghien cuu cong cu nganh cong hoc xa hoi ca phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach hoc) OR (sach hoi)) tap, nghien cuu cong cu nganh cong hoc xa hoi ca phan dau.
• Adding a wildcard symbol may retrieve word variants: su ((sach hoc) or (sach hoi)) tap, nghien cuu cong cu nganh cong hoc xa hoi ca phan dau*.