Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
doanh van » doan van, doanh va, doanh ban
cua trong » cua truong, cua trung, qua trong
canh van » anh van, can van, cach van
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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 - ((doanh van) or (canh van)) cua trong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((doanh van) OR (canh van)) cua trong cong san toan ban*.