Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
chiet tach » chieu sach
quan trong » gian trong
cong thanh » dong thanh, cong trinh, cong tan
hien tach » thien hach, vien bach, hien hanh
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) or (chiet tach)) - thanh thong 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) OR (chiet tach)) - thanh thong quan trong cong thanh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tach) or (chiet tach)) - thanh thong quan trong cong thanh ((toan cau) or (toan ban))*.