Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
doanh van » doan van, doanh va, doanh ban
dang cong » dung cong
toc hieu » toc thieu, doc hieu, hoc thieu
van quan » van ban
van phan » van phong, van thanh, luan phan
phan bac » phan cac, phan ba, pham bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu lang - doanh van quan ((phung van) or (dang cong)) van phan bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu lang - doanh van quan ((phung van) OR (dang cong)) van phan bac.
• Adding a wildcard symbol may retrieve word variants: toc hieu lang - doanh van quan ((phung van) or (dang cong)) van phan bac*.