Perhaps you should try some spelling variations:
nguyen huu » nguyen duc
thanh van » thanh san, thanh toan, thanh phan
cach hoc » cach thuc, cach thoi, dich hoc
huu tuan » huu han, huu tung
tuan hoc » toan hoc, luan hoc, than hoc
pho khoa » phu khoa, pha khoa, tho khoa
khoa hoc » hoa hoc
va thanh » gia thanh, ban thanh, va tinh
su cach » su sach, tu cach, su cac
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: su cach hoc tap, nguyen huu tuan hoc pho khoa hoc ((ma hoi) or (xa hoi)) va thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach hoc tap, nguyen huu tuan hoc pho khoa hoc ((ma hoi) OR (xa hoi)) va thanh van.
• Adding a wildcard symbol may retrieve word variants: su cach hoc tap, nguyen huu tuan hoc pho khoa hoc ((ma hoi) or (xa hoi)) va thanh van*.