Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
doi chiet » doi chieu, doi chi, doi viet
van khang » van khanh, van thanh, van quang
van hang » van hoang, van thang, ban hang
san quan » van quan, ban quan, san luan
dan quan » van quan, ban quan, dan luan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh trinh ((van hang) OR (van khang)) cong ((san quan) or (dan quan)) ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh trinh ((van hang) OR (van khang)) cong ((san quan) OR (dan quan)) ha*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - hanh trinh ((van hang) OR (van khang)) cong ((san quan) or (dan quan)) ha*".