Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
canh luan » doanh luan, tranh luan, chinh luan
van thang » van thanh, van khang, van than
doc hieu » toc thieu, hoc thieu, hoc hien
van hang » van khang, van hoang, ban hang
nong tac » cong tac, dong tac, nong tan
tac toan » tap toan, tam toan, hach toan
toan ban » 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 manh - canh luan ((van hang) OR (van thang)) nong tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - canh luan ((van hang) OR (van thang)) nong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - canh luan ((van hang) OR (van thang)) nong tac toan ban*.