Perhaps you should try some spelling variations:
thanh trung » thanh tung
tang cong » tang cuong, trang cong, dang cong
chu nang » chua 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 tang » phap tang, cao tang, kho tang
chuc » thuc, chua, phuc

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