Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
tang mai » tang ma, tang tai, lang mai
hieu van » hieu va, thien van, lieu va
cuu tre » cau tren, cau treo
hanh va » hang va, hanh vi
cua tre » cua te, cua triet, dua tren
cam duc » cam xuc, cao duc, pham duc
van cam » van nam, van lam, van cau
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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 ky tang mai hoi. hieu van cam duc va ((thanh tai) OR (hanh va)) ((cuu tre) OR (cua tre))~.
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang mai hoi. hieu van cam duc va ((thanh tai) or (hanh va)) ((cuu tre) or (cua tre))*.