Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac
ban ky » van ky, dan ky
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
dan du » dan dau, danh du, dan su
tu ban » thu ban, te ban

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

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