Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
chieu sach » chinh sach, chiet tach, chieu sang
dang trong » dung trong, dong trong, lang trong
doanh cua » doanh luan
trong dan » trong dang, trong san, trong tan
hieu cac » hieu luc, hieu va, hieu van
cua dang » cua cong, cua ban
gian cau » gian chau, gian cac, gian cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cac) or (chieu sach)) - doanh doanh cua dang trong dan gian cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cac) OR (chieu sach)) - doanh doanh cua dang trong dan gian cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cac) or (chieu sach)) - doanh doanh cua dang trong dan gian cau*.