Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sach » chinh sach, chiet tach, chieu sang
trung ca » trung cap, truong ca, trung cua
ca trong » cay trong, cad trong, co trong
cong tac » cong ty
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: ho ((chieu tinh) OR (chieu sach)) - thanh trung ca trong cong tac ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) or (chieu sach)) - thanh trung ca trong cong tac ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) or (chieu sach)) - thanh trung ca trong cong tac ((toan cau) OR (toan cao))*.