Perhaps you should try some spelling variations:
thanh trung » thanh tung
dong cong » duong cong, dung cong, dang cong
trung ha » trung hoc, trung tam, trung cap
cong san » cong tac
toan tai » toan tap, toan ban, von tai
toan cao » toan ban, toan tap
ha dong » hoat dong, van dong
trieu » thieu, trien, tieu

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: dong trieu tinh - thanh trung ha dong cong san ((((toan tai) OR (doanh tai))) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong trieu tinh - thanh trung ha dong cong san ((((toan tai) OR (doanh tai))) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: dong trieu tinh - thanh trung ha dong cong san ((((toan tai) OR (doanh tai))) or (toan cao))*.