Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thanh hai » thanh phan, thanh hoa, thanh san
tam dang » nam dang, tam dan, tran dang
nong tan » cong tan, nong dan, nong san
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (thien hach)) - thanh trung tam dang ((nong tan) or (cong san)) thanh hai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - thanh trung tam dang ((nong tan) OR (cong san)) thanh hai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - thanh trung tam dang ((nong tan) or (cong san)) thanh hai".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (thien hach)) - thanh trung tam dang ((nong tan) or (cong san)) thanh hai*.