Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cao » truong cao, trung cap, trung co
hang cong » dang cong, hang nong, bang cong
trang cho » trong cho, trang o, sang cho
cao hang » cao dang, cao tang, cao bang
cong san » cong tac
tran cao » toan cao, tran chau, tranh cac

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: ho ((hieu manh) OR (chinh sach)) - thanh trung cao hang cong san ((tran cao) OR (trang cho))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chinh sach)) - thanh trung cao hang cong san ((tran cao) OR (trang cho))~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chinh sach)) - thanh trung cao hang cong san ((tran cao) OR (trang cho))*.