Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
lam duoc » nam duoc, luat duoc, lam thuoc
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
lam xuc » cam xuc
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
vi cau » va cau, ve cau, di cau
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 sang ma hoi. hieu van ((lam xuc) OR (lam duoc)) ban thanh vi cau tren~.
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ma hoi. hieu van ((lam xuc) or (lam duoc)) ban thanh vi cau tren*.