Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
va hang » van hang, va nang, va lang
hai cua » dai cua, hoi cua, lai cua
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky
nang o » nang co, nang ho, nang ro
luc va » duc va, tuc va, loc va
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 bai ky nang o hoi. hieu va cac luc va hang ((hai cua) or (thai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky nang o hoi. hieu va cac luc va hang ((hai cua) OR (thai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu bai ky nang o hoi. hieu va cac luc va hang ((hai cua) or (thai cua)) tre*.