Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
cuu tre » cau tren, cau treo
va danh » va dinh, va dan, va hanh
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cua tre » cua te, cua triet, dua tren
hieu va » lieu va, hieu qua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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 tang ma hoi. hieu va ((tao duoc) or (giao duc)) va danh vai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang ma hoi. hieu va ((tao duoc) OR (giao duc)) va danh vai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang ma hoi. hieu va ((tao duoc) or (giao duc)) va danh vai ((cua tre) or (cuu tre))*.