Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
va nang » van nang, da nang, cam nang
va hang » van hang, va lang, va hanh
cao luc » bao luc, cao duc, cao suc
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
va cao » va cac, va co, va dao
bai ky » ban ky, sai ky, bac ky
nang o » nang ho, nang ro, nang x
tu bai » tu ban, tu bat, te bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu bai ky ((nang o) or (nang co)) hoi. hieu va cao luc ((va hang) or (va nang)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky ((nang o) OR (nang co)) hoi. hieu va cao luc ((va hang) OR (va nang)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu bai ky ((nang o) or (nang co)) hoi. hieu va cao luc ((va hang) or (va nang)) hai cua tre*.