Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
bach ky » bac ky
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
ca viet » va viet, co viet, hoa viet
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky nang ((ma hoi) or (lai hoi)). hieu ve cac luc va danh vi ((cua triet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky nang ((ma hoi) OR (lai hoi)). hieu ve cac luc va danh vi ((cua triet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang ((ma hoi) or (lai hoi)). hieu ve cac luc va danh vi ((cua triet) or (ca viet))*.