Perhaps you should try some spelling variations:
thuoc dang » thuoc dung, thuoc khang, thuc dan
chuc dang » chuc nang, chuc danh, thuc dan
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
ha chau » hat chau, lai chau, hoa chat
a chau » lai chau, hat chau, mai chau

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: ((ha chau) OR (a chau)) tinh - canh tranh ((chuc dang) OR (thuoc dang)) cong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ha chau) or (a chau)) tinh - canh tranh ((chuc dang) OR (thuoc dang)) cong dan than cau~".
• Adding a wildcard symbol may retrieve word variants: ((ha chau) or (a chau)) tinh - canh tranh ((chuc dang) OR (thuoc dang)) cong dan than cau*.