Perhaps you should try some spelling variations:
nganh dong » nganh cong, nhanh dong, nganh nong
hoc nganh » hoc nhanh
sach doi » sach hoi, sach moi, sach dao
dong hoc » dong co, dong luc
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc
va luan » vay luan, van luan, va quan
ma hoi » mai hoi, ma hoa, me hoi

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 doi tap, nghien cuu mon hoc nganh dong hoc ((ma hoi) or (xa hoi)) va luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi tap, nghien cuu mon hoc nganh dong hoc ((ma hoi) OR (xa hoi)) va luan van.
• Adding a wildcard symbol may retrieve word variants: tu sach doi tap, nghien cuu mon hoc nganh dong hoc ((ma hoi) or (xa hoi)) va luan van*.