Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu xanh » chieu sach, chieu sang, chieu tinh
chu xanh » chu manh, chua xang, chuc danh
tang van » dang van, hoang van, trong van
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
tang va » trang va, thang va, tang vat

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) or (chieu xanh)) - hanh ((tang va) OR (tang van)) nhung cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chieu xanh)) - hanh ((tang va) OR (tang van)) nhung cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chieu xanh)) - hanh ((tang va) OR (tang van)) nhung cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chieu xanh)) - hanh ((tang va) OR (tang van)) nhung cong san toan ban*.