Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tranh huy » thanh huy, trang huy, tranh chua
dong cong » duong cong, dung cong, dang cong
huy dong » ha dong
ban cau » bang cau, van cau, ban dau
ban can » ban dan, ban hang, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - canh tranh huy dong cong thanh ((ban cau) OR (ban can))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh tranh huy dong cong thanh ((ban cau) OR (ban can))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh huy dong cong thanh ((ban cau) OR (ban can))*.