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 va » trinh van, trinh vat, trinh ve
cong van » cong vang, song van, cong tan
cong san » cong tac
va dang » van dang, va nang, va lang
quan ha » quan he

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 va dang ((cong van) OR (cong san)) quan ha~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - hanh trinh va dang ((cong van) OR (cong san)) quan ha".
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh trinh va dang ((cong van) OR (cong san)) quan ha*.