Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
truong quan » trong quan, thong quan, luong quan
thien hach » thien thanh, hien hanh
chiet tach » chieu sach
quan trong » gian trong
cong thanh » dong thanh, cong trinh, cong tan
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 ((thien hach) or (chiet tach)) - thanh truong quan trong cong thanh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (chiet tach)) - thanh truong quan trong cong thanh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (chiet tach)) - thanh truong quan trong cong thanh ((toan cau) or (toan ban))*.