Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
hieu vu » hieu va, hieu ve, hieu su
xuc van » duc van, luc van, vuc van
ky tang » ky nang, ky dang, kho tang
dan hoc » van hoc, dai hoc, toan hoc
vai cua » hai cua, lai cua, bai cua
vu chat » va chat, ve chat, du chat
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 ((dan hoc) OR (dan toc)). hieu vu chat xuc van hanh ((vai cua) OR (dai cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang ((dan hoc) or (dan toc)). hieu vu chat xuc van hanh ((vai cua) OR (dai cua)) te~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang ((dan hoc) or (dan toc)). hieu vu chat xuc van hanh ((vai cua) OR (dai cua)) te*.