Perhaps you should try some spelling variations:
vanh dai » vanh tai, lanh dao, van dao
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
van dai » van dao, van hai, can dai
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu san, tu bac
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
o hai » co hai, so hai, o lai

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 sac) OR (tu cac)) ky nang o hai. hieu va cam tuc va ((vanh dai) OR (van dai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu cac)) ky nang o hai. hieu va cam tuc va ((vanh dai) OR (van dai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky nang o hai. hieu va cam tuc va ((vanh dai) OR (van dai)) cua tre*.