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