Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
thanh toan » thanh hoa, thanh san, tinh toan
phan khoa » pham khoa, nhan khoa, phan hoa
cach hoc » cach thuc, cach thoi, dich hoc
huu tuan » huu han, huu tung
tuan hoc » toan hoc, luan hoc, than hoc
hoc phan » hoc dan, hoc pho
khoa hoc » hoa hoc
va thanh » gia thanh, ban thanh, va tinh
su cach » su sach, tu cach, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach hoc tap, nghien huu tuan hoc phan khoa hoc ((ma hoa) or (xa hoi)) va thanh toan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach hoc tap, nghien huu tuan hoc phan khoa hoc ((ma hoa) OR (xa hoi)) va thanh toan.
• Adding a wildcard symbol may retrieve word variants: su cach hoc tap, nghien huu tuan hoc phan khoa hoc ((ma hoa) or (xa hoi)) va thanh toan*.