Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
truong gian » truong giang, truong giao, truong van
thiet tach » chiet tach, thien hach
thuat tach » thuat sach, thuat mach, thuat tac
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 ((thiet tach) OR (thuat tach)) - thanh truong gian trong cong thanh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (thuat tach)) - thanh truong gian trong cong thanh ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) OR (thuat tach)) - thanh truong gian trong cong thanh ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) OR (thuat tach)) - thanh truong gian trong cong thanh ((toan cau) or (toan ban))*.