Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, pham duc, nam duoc
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
te cac » tu cac, ve cac, te cao
tu san » thu san, tu ban, tu can

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 (tu san)) ky tang xa hoi. hieu va ((cam duc) OR (cao duc)) va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (tu san)) ky tang xa hoi. hieu va ((cam duc) OR (cao duc)) va hanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) or (tu san)) ky tang xa hoi. hieu va ((cam duc) OR (cao duc)) va hanh tai cua tre*".