Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thien van » thi van
ban thanh » ban hanh, ban hang
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, lieu va, hieu ve
thanh vi » hanh vi, thanh va, thanh ve
thu ban » thu hang
su sach » so sach, vu sach
cam thu » nam thu, cac thu, ca thu
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
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: su sach y nang ma hoi. ((hieu van) OR (thien van)) cam thu ban thanh vi ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. ((hieu van) OR (thien van)) cam thu ban thanh vi ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. ((hieu van) OR (thien van)) cam thu ban thanh vi ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. ((hieu van) OR (thien van)) cam thu ban thanh vi ((cua triet) or (cua viet))*.