Perhaps you should try some spelling variations:
chat soc » cham soc, chat hoc, chat doc
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
soc ban » hoc ban, coc ban, so ban
lai cua » dai cua, lai chau, thai cua
hai cua » thai cua, dai cua, hoi cua
tu can » tu ban, thu canh

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: ((tu can) OR (tu cac)) ky nang xa hoi. hieu va chat soc ban hanh ((lai cua) OR (hai cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu can) or (tu cac)) ky nang xa hoi. hieu va chat soc ban hanh ((lai cua) OR (hai cua)) te~".
• Adding a wildcard symbol may retrieve word variants: ((tu can) or (tu cac)) ky nang xa hoi. hieu va chat soc ban hanh ((lai cua) OR (hai cua)) te*.