Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
doanh van » doan van, doanh va, doanh ban
hang cong » dang cong, hang nong, bang cong
ban nhanh » ban hanh, ban thanh, ban nhan
nhanh bac » nhanh ha, nhanh va
doc hieu » toc thieu, hoc thieu, hoc hien
van quan » 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: doc hieu lang - doanh van quan ((phung van) or (hang cong)) ban nhanh bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - doanh van quan ((phung van) OR (hang cong)) ban nhanh bac.
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - doanh van quan ((phung van) or (hang cong)) ban nhanh bac*.