Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
cong thanh » dong thanh, cong trinh, cong tan
tuan dung » tuan duong, tran dung, tan dung
cong san » cong tac
toan cao » toan tap
toan ban » van ban
hoc thi » hoc thai, hoc tai, hoc chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thi thanh - thanh trung tuan dung ((cong san) or (cong thanh)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thi thanh - thanh trung tuan dung ((cong san) OR (cong thanh)) ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thi thanh - thanh trung tuan dung ((cong san) or (cong thanh)) ((toan cao) or (toan ban))*.