Perhaps you should try some spelling variations:
van chat » cao chat
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
chat xuc » chat huu, cam xuc, chao xu
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
ky tang » ky nang, ky dang, kho tang
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, 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 ky tang ((ma hoi) or (ma hoa)). hieu van chat xuc va hanh dai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ((ma hoi) OR (ma hoa)). hieu van chat xuc va hanh dai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ((ma hoi) or (ma hoa)). hieu van chat xuc va hanh dai ((cua tre) or (cuu tre))*.