Perhaps you should try some spelling variations:
lanh manh » lanh tranh, lan anh, van manh
cong tacg » cong tang, cong thang, cong tan
chi sang » chi lang, chieu sang, chi chang
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
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 - lanh manh cua dung ((cong tac) or (cong tacg)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - lanh manh cua dung ((cong tac) OR (cong tacg)) van ban*.