Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chiet » doi chieu, doi chi, doi viet
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
chay cao » cay cao, chat cao, cay co

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh tranh cua dung ((cong san) OR (cong ty)) ((chay cao) OR (nha cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - hanh tranh cua dung ((cong san) or (cong ty)) ((chay cao) OR (nha cao))~".
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh tranh cua dung ((cong san) or (cong ty)) ((chay cao) OR (nha cao))*.