Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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 sang) OR (ky tang)) ((ma hoi) or (xa hoi)). hieu ve cam tuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky tang)) ((ma hoi) OR (xa hoi)). hieu ve cam tuc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky sang) OR (ky tang)) ((ma hoi) or (xa hoi)). hieu ve cam tuc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) OR (ky tang)) ((ma hoi) or (xa hoi)). hieu ve cam tuc va hanh vai cua tre*.