Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
thanh dung » thanh duong, thanh tung, thanh hung
cong thanh » dong thanh, cong trinh, cong tan
cua dong » chua dong, cua cong, cua nong
cua dang » cua cong, cua ban
san cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (nhieu tang)) - thanh dung ((cua dong) OR (cua dang)) cong thanh san cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (nhieu tang)) - thanh dung ((cua dong) OR (cua dang)) cong thanh san cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (nhieu tang)) - thanh dung ((cua dong) OR (cua dang)) cong thanh san cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (nhieu tang)) - thanh dung ((cua dong) OR (cua dang)) cong thanh san cau*.