Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
truoc va » truc va, thuoc va, truong va
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu van
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((cac ky) or (sach y)) dang xay hoi. ((hieu ve) or (hieu va)) lam truoc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cac ky) OR (sach y)) dang xay hoi. ((hieu ve) OR (hieu va)) lam truoc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((cac ky) or (sach y)) dang xay hoi. ((hieu ve) or (hieu va)) lam truoc va hanh vai cua tre*.