Perhaps you should try some spelling variations:
cuu tre » cau tren, cau treo
cam luc » cam xuc, cau luc
cua tre » cua te, cua triet, dua tren
han tai » hang tai, nhan tai, van tai
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
va han » va phan, van han, va hanh
te sac » te sach, te cac, te san
luc va » duc va, tuc va, loc va
tu san » thu san, tu ban, tu can
va cam » va cham, va cac, va 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 sac) or (tu san)) ky tang xa hoi. hieu va cam luc va han tai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (tu san)) ky tang xa hoi. hieu va cam luc va han tai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (tu san)) ky tang xa hoi. hieu va cam luc va han tai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (tu san)) ky tang xa hoi. hieu va cam luc va han tai ((cua tre) OR (cuu tre))*.