Perhaps you should try some spelling variations:
cac khoi » cac khoan, cach thoi, hoc khoi
cac thoi » cac toi, cac hop, cac tro
tang dan » tang van, tung dan, tang luan
dan hoi » dan hoc, dai hoi, van hoi
hieu vu » hieu va, hieu ve, hieu su
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
cua cau » cua cac, cua chu, cua cay
vu cam » vu cham, vu cao, va cam
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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 ((cac khoi) OR (cac thoi)) tang dan hoi. hieu vu cam luc va hanh vi cua cau~.
• Adding a wildcard symbol may retrieve word variants: tu ((cac khoi) or (cac thoi)) tang dan hoi. hieu vu cam luc va hanh vi cua cau*.