Perhaps you should try some spelling variations:
duong cong » dung cong, luong cong, duong trong
danh trung » dang trung, dinh trung, manh trung
dap duong » dai duong, dam duong, doan duong
chi sang » chi lang, chieu sang, chi chang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sang - ((danh trung) or (canh tranh)) dap duong cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - ((danh trung) OR (canh tranh)) dap duong cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: doi chi sang - ((danh trung) or (canh tranh)) dap duong cong dan toan tap*.