Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
cua viet » ca viet, hoa viet, cua vat
thi van » thi lan, thi hanh, thi nang
vai cua » dai cua, hai cua, lai cua
te cac » tu cac, ve cac, te cao
va ban » van ban, va bai, va bao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cac) or (va cac)) ky nang x hoi. ((thien van) OR (thi van)) nam va ban thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (va cac)) ky nang x hoi. ((thien van) OR (thi van)) nam va ban thanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) or (va cac)) ky nang x hoi. ((thien van) OR (thi van)) nam va ban thanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (va cac)) ky nang x hoi. ((thien van) OR (thi van)) nam va ban thanh vai cua viet*.