Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien hanh » dieu hanh
trung va » truong va, trang va, trung ha
va trong » va truong, va thong, va tuong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
chan cao » chan cho, chat cao, chay cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - thanh trung va trong ((cong dan) OR (cong tan)) chan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - thanh trung va trong ((cong dan) OR (cong tan)) chan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - thanh trung va trong ((cong dan) OR (cong tan)) chan cao*.