Perhaps you should try some spelling variations:
chua xang » chua nang, chuc nang, chu bang
tang luan » dung luan
dong cong » duong cong, dung cong, dang cong
chu xanh » chu manh, chieu xanh, chuc danh
tang cua » mang cua, hang cua, thong cua
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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 ((chu xanh) OR (chua xang)) - hanh ((tang cua) OR (tang luan)) dong cong dan van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chua xang)) - hanh ((tang cua) OR (tang luan)) dong cong dan van ban~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chua xang)) - hanh ((tang cua) OR (tang luan)) dong cong dan van ban*.