Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
lieu tinh » trieu tinh, diep tinh, bien tinh
doi lieu » duoc lieu, doi chieu, du lieu
tuan ban » tuan bang, luan ban, quang ban
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: doi lieu tinh - thanh trung tuan ban ((cong tan) OR (cong san)) ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi lieu tinh - thanh trung tuan ban ((cong tan) OR (cong san)) ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: doi lieu tinh - thanh trung tuan ban ((cong tan) OR (cong san)) ((toan cau) or (toan ban))*.