Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cua trong » cua truong, cua trung, qua trong
canh ban » can ban, canh dan, canh van
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
anh van » anh va, thanh van, doanh 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 hieu lang - ((canh ban) or (anh van)) cua trong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((canh ban) OR (anh van)) cua trong cong san toan ban*.