Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
cac tuc » cac toc, cac tu, cac tac
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
cac toi » cac thoi
hieu va » lieu va, hieu qua
hieu ve » hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
va dan » ca dan, va dao, va dau
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky sang ma hoi. ((hieu ve) or (hieu va)) ((cac tuc) or (cac toi)) va dan vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ma hoi. ((hieu ve) OR (hieu va)) ((cac tuc) OR (cac toi)) va dan vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ma hoi. ((hieu ve) or (hieu va)) ((cac tuc) or (cac toi)) va dan vai cua tre*.