Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
manh cua » doanh cua, ban cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
chu van » cuu van

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 van) or (chu han)) - hanh ((tang luan) or (manh cua)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu van) OR (chu han)) - hanh ((tang luan) OR (manh cua)) nhung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chu van) or (chu han)) - hanh ((tang luan) or (manh cua)) nhung cong dan toan cau*.