Perhaps you should try some spelling variations:
tang luan » dung luan
dung cong » dung trong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
tang cua » mang cua, hang cua, thong cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - hanh ((tang cua) or (tang luan)) dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - hanh ((tang cua) OR (tang luan)) dung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh ((tang cua) or (tang luan)) dung cong dan toan cao*.