Perhaps you should try some spelling variations:
cham duc » cham soc, pham duy, phan duc
ban hanh » ban hang
hanh lap » thanh lap, hanh lam, hanh cap
va triet » va thiet, va trien, ve triet
hieu ve » hieu va, hieu van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
lap va » tap va
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang x hoi. ((hieu ve) OR (lieu va)) ((cham duc) OR (pham duc)) ban hanh lap va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang x hoi. ((hieu ve) or (lieu va)) ((cham duc) OR (pham duc)) ban hanh lap va triet~".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x hoi. ((hieu ve) or (lieu va)) ((cham duc) OR (pham duc)) ban hanh lap va triet*.