Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va
va hanh » van hanh, va thanh, va danh
cao duc » dao duc, cao suc, giao duc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
cua te » cua tu
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 sac ky nang o hoi. ((hieu ve) or (hieu van)) ((pham duc) or (cao duc)) va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang o hoi. ((hieu ve) OR (hieu van)) ((pham duc) OR (cao duc)) va hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang o hoi. ((hieu ve) or (hieu van)) ((pham duc) or (cao duc)) va hanh vai cua te*.