Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
truong va » truong dai, truong cao, truong dao
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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) or (hieu lang)) - thanh truong va nhung cong san ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (hieu lang)) - thanh truong va nhung cong san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chiet tach) or (hieu lang)) - thanh truong va nhung cong san ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (hieu lang)) - thanh truong va nhung cong san ((toan cao) OR (toan ban))*.