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
trinh van » trinh han, trinh quan, trinh toan
van hang » van khang, van hoang, van thang
cong van » cong vang, song van, cong tan
cong san » cong tac
quan cau » quang cao, toan cau, quan ha

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 ((cong van) OR (cong san)) quan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - hanh trinh van hang ((cong van) OR (cong san)) quan cau*".