Perhaps you should try some spelling variations:
nganh tuong » nganh cong, manh tuong, nganh nong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoc nganh » hoc nhanh
tuong hoc » truong hoc, tuong ho, duong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cong hoc » dong hoc, cong hoa, cong coc
cac nhan » ca nhan, cam nhan, dac nhan
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa

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 tap, nghien thu cong hoc nganh tuong hoc ma hoi ((cac nhan) or (cac nha)) dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien thu cong hoc nganh tuong hoc ma hoi ((cac nhan) OR (cac nha)) dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien thu cong hoc nganh tuong hoc ma hoi ((cac nhan) or (cac nha)) dan*.