Perhaps you should try some spelling variations:
hieu sang » chieu sang, hieu lang, hieu quang
tac doanh » cac doanh, tac danh, toan doanh
doanh cao » doanh co, doanh bao, doanh cho
doc hieu » toc thieu, hoc thieu, hoc hien
hanh ban » thanh ban, hang ban, hanh san
ban gian » dan gian, van gian, ban giao
cong tac » cong ty

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 sang - hanh ban gian trong cong tac doanh cao~.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - hanh ban gian trong cong tac doanh cao*.