Perhaps you should try some spelling variations:
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
theo cua » thao cua, tho cua, cheo cua
cua sinh » hoa sinh, va sinh
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
toan ban » van ban

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: theo cua sinh - anh tang ((cua khong) OR (hua khong)) cong dan ((toan tap) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: theo cua sinh - anh tang ((cua khong) or (hua khong)) cong dan ((toan tap) or (toan ban))*.