Perhaps you should try some spelling variations:
thanh trung » thanh tung
chon chinh » cho chinh, chinh chinh, thong chinh
thon chinh » thong chinh, thuong chinh, thien chinh
duong cong » dung cong, luong cong, duong trong
trung cao » truong cao, trung cap, trung co
cao duong » cau duong, bao duong, cao cuong
thanh lap » thanh san, phan lap, thanh hai
cong dan » cong san, cong tan, huong dan
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((chon chinh) OR (thon chinh)) sach - thanh trung cao duong cong dan ((khan cap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((chon chinh) OR (thon chinh)) sach - thanh trung cao duong cong dan ((khan cap) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((chon chinh) OR (thon chinh)) sach - thanh trung cao duong cong dan ((khan cap) or (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: ((chon chinh) OR (thon chinh)) sach - thanh trung cao duong cong dan ((khan cap) or (thanh lap))*.