Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu van » tu va
tuc va » truc va, tuc xa, duc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky nang x hoi. ((hieu van) or (hieu va)) cam ((tuc va) or (thuc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky nang x hoi. ((hieu van) OR (hieu va)) cam ((tuc va) OR (thuc va)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu van ky nang x hoi. ((hieu van) or (hieu va)) cam ((tuc va) or (thuc va)) hanh vai cua tre*.