Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
van lao » van dao, van bao, van lam
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
luc va » tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky nang x ho. hieu van lao ((luc va) OR (duc va)) hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky nang x ho. hieu van lao ((luc va) OR (duc va)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang x ho. hieu van lao ((luc va) OR (duc va)) hanh vai cua tre*.