Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
lam duoc » nam duoc, luat duoc, lam thuoc
thanh va » thanh van, hanh va, thanh ha
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lam xuc » cam xuc
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
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 ky tang ma hoi. hieu van ((lam xuc) or (lam duoc)) ban thanh va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoi. hieu van ((lam xuc) OR (lam duoc)) ban thanh va ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ma hoi. hieu van ((lam xuc) or (lam duoc)) ban thanh va ((cua tre) or (cua triet))*.