Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cao » va cao, ve bao, ve cac
cua te » cua tu
cua cu » cua chu, cua cau, cua su
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 ((xa hoi) or (o hoi)). hieu ve cao duc va hanh tai ((cua te) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((xa hoi) OR (o hoi)). hieu ve cao duc va hanh tai ((cua te) OR (cua cu)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((xa hoi) or (o hoi)). hieu ve cao duc va hanh tai ((cua te) or (cua cu))*.