Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, truong thanh
nhung cong » dung cong, thong cong, hang cong
tran tuan » tran xuan, tran quang, tran thanh
theo chu » theo chieu, cho chu, chao chu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (theo chu)) sach - thanh ((trung tuan) OR (tran tuan)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (theo chu)) sach - thanh ((trung tuan) OR (tran tuan)) nhung cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (theo chu)) sach - thanh ((trung tuan) OR (tran tuan)) nhung cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (theo chu)) sach - thanh ((trung tuan) OR (tran tuan)) nhung cong dan toan cau*.