Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
tang dan » tang van, tung dan, tang luan
hieu vu » hieu va, hieu su, dieu vu
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
ky tang » ky nang, ky dang, kho tang
dan hoc » van hoc, dan toc, dai hoc
xu van » tu van, vu van, su van
tu sac » tu sach, tu cac, tu bac
tu san » thu san, tu ban, tu can
cua te » cua tu

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