Perhaps you should try some spelling variations:
quan trong » gian trong
tan doanh » toan doanh, van doanh, san doanh
doanh cho » danh cho, doanh co, doanh cao
doc hieu » toc thieu, hoc thieu
hanh van » thanh van, khanh van, hanh va
van quan » van ban
cong tan » cong tac, cong san, cong thanh

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) or (hoc hien)) sang - hanh van quan trong cong tan doanh cho~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) sang - hanh van quan trong cong tan doanh cho.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) sang - hanh van quan trong cong tan doanh cho*.