Perhaps you should try some spelling variations:
quan trong » gian trong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, mot chieu
tan doanh » toan doanh, van doanh, san doanh
doanh cao » doanh co, doanh bao, doanh cho
hanh ban » thanh ban, hanh san, hanh han
hang ban » hang luan, hang va, hang tai
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: doi chieu sang - ((hanh ban) OR (hang ban)) quan trong cong tan doanh cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((hanh ban) OR (hang ban)) quan trong cong tan doanh cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((hanh ban) OR (hang ban)) quan trong cong tan doanh cao*.