Perhaps you should try some spelling variations:
hinh trong » chinh trong, dinh trong, sinh trong
dong thanh » truong thanh
tieu tinh » trieu tinh, tieu trinh, lieu tinh
trong su » trong san, trong thu, trong qua
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - hinh trong su dung ((cong dan) OR (dong thanh)) ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu tinh - hinh trong su dung ((cong dan) or (dong thanh)) ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - hinh trong su dung ((cong dan) or (dong thanh)) ((toan cau) OR (toan cao))*.