Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
cuu tre » cua tre, cau tren, cau treo
vai cuu » vai cua
hieu va » lieu va, hieu qua
xay hoi » xa hoi, cay phoi, gay thoi
tay hoi » tay ho, tao hoi, tay thai
sai ky » sac ky
va hac » van hac, va khac, va cac
tuc va » thuc va, truc va, duc va
tu sai » tu bai, tu san, tu cai
ky va » ly va, ke va, my va

You may be able to get more results by adjusting your search query.

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