Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
nuoc van » nuoc va, nuoc san, luoc van
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cuu tre » cau tren
cua tre » cua te, cua triet, dua tren
anh dao » lanh dao, hanh dao, anh dat
van anh » van thanh, tuan anh, van minh
qua cac » cua cac
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
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 lang ha hoi. hieu qua cac nuoc van anh dao ((cua tre) or (((cuu tre) or (cau treo))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang ha hoi. hieu qua cac nuoc van anh dao ((cua tre) OR (((cuu tre) OR (cau treo)))).
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang ha hoi. hieu qua cac nuoc van anh dao ((cua tre) or (((cuu tre) or (cau treo))))*.