Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh tung, thanh huong
thanh thuong » thanh huong, thanh chuong, thanh phuong
quan trong » gian trong
cong thanh » dong thanh, cong trinh, cong tan
hien tach » thien hach, chiet tach, vien bach
toan cau » toan cao, toan tap, toan tai
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: hoc hien tach - ((thanh truong) OR (thanh thuong)) quan trong cong thanh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tach - ((thanh truong) OR (thanh thuong)) quan trong cong thanh ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien tach - ((thanh truong) OR (thanh thuong)) quan trong cong thanh ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hien tach - ((thanh truong) OR (thanh thuong)) quan trong cong thanh ((toan cau) or (toan ban))*.