Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
vu sach » vu bach, su sach, vu khach
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
xac va » tac va, ac va, bac va
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: vu sach ((ty nang) or (ty xang)) xa hoi. hieu ve cam ((xac va) or (tuc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty nang) OR (ty xang)) xa hoi. hieu ve cam ((xac va) OR (tuc va)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty nang) or (ty xang)) xa hoi. hieu ve cam ((xac va) or (tuc va)) hanh vai cua tre*.