Perhaps you should try some spelling variations:
thai son » thai den, thai hoc, thai o
danh vai » danh sai, danh va, doanh van
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
thai do » thay doi, thai den
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao

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 ky nang xa hoi. ((hieu va) or (hieu qua)) ((thai son) OR (thai do)) va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky nang xa hoi. ((hieu va) OR (hieu qua)) ((thai son) OR (thai do)) va danh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky nang xa hoi. ((hieu va) or (hieu qua)) ((thai son) OR (thai do)) va danh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te cac ky nang xa hoi. ((hieu va) or (hieu qua)) ((thai son) OR (thai do)) va danh vai cua tre*.