Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
trung cao » truong cao, trung cap, trung co
cao nhung » cho nhung, cam nhung, cao chung
cong van » cong vang, song van, cong tan
cong san » cong tac
tuan cau » toan cau, quan cau, tuan cu

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) or (nhieu tang)) - thanh trung cao nhung ((cong van) OR (cong san)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (nhieu tang)) - thanh trung cao nhung ((cong van) OR (cong san)) tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (nhieu tang)) - thanh trung cao nhung ((cong van) OR (cong san)) tuan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (nhieu tang)) - thanh trung cao nhung ((cong van) OR (cong san)) tuan cau*.