Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
hanh dai » hanh tai, hanh dao, vanh dai
cuc ban » cua ban, cac ban, duc ban
cuu ban » cuu van, cua ban, cuu san
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 nang o hoi. hieu van pham ((cuc ban) OR (cuu ban)) hanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang o hoi. hieu van pham ((cuc ban) OR (cuu ban)) hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang o hoi. hieu van pham ((cuc ban) OR (cuu ban)) hanh dai cua tre*.