Perhaps you should try some spelling variations:
thanh trung » thanh tung
chua nang » chuc nang, chua xang, kha nang
tong cong » trong cong, cong cong, dung cong
chu nang » chuc nang, cuu nang, chu bang
trung ha » trung hoc, trung tam, trung cap
cong san » cong tac
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
ha tong » han tong, ha dong, ha tang

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: tho ((chu nang) OR (chua nang)) - thanh trung ha tong cong san ((toan tai) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tho ((chu nang) OR (chua nang)) - thanh trung ha tong cong san ((toan tai) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: tho ((chu nang) OR (chua nang)) - thanh trung ha tong cong san ((toan tai) or (toan ban))*.