Perhaps you should try some spelling variations:
tran thanh » van thanh, quan thanh
hoc thieu » toc thieu, hoc hien
ban thanh » ban hanh, ban hang
dung cong » dung trong
ho chieu » theo chieu, doi chieu, mot chieu
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: ((ho chieu) or (hoc thieu)) xanh - manh ((tran thanh) or (ban thanh)) dung cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - manh ((tran thanh) OR (ban thanh)) dung cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - manh ((tran thanh) or (ban thanh)) dung cong san toan ban*.