Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung cong » truong cong, trong cong, trung uong
hieu lang » chieu sang, hieu quang, nhieu tang
cua trung » cua truong, xuan trung, cua nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((canh tranh) or (thanh trung)) cua trung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((canh tranh) OR (thanh trung)) cua trung cong dan toan cao*.