Perhaps you should try some spelling variations:
thanh hoang » thanh cong, thanh toan, tran hoang
thanh hoa » thanh pho
theo cau » theo chu, theo dau, theo mau
theo cap » theo phap, pho cap, theo chu
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo cau) OR (theo cap)) sach - tinh toan ((thanh hoang) or (thanh hoa)) cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo cau) OR (theo cap)) sach - tinh toan ((thanh hoang) OR (thanh hoa)) cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo cau) OR (theo cap)) sach - tinh toan ((thanh hoang) or (thanh hoa)) cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ((theo cau) OR (theo cap)) sach - tinh toan ((thanh hoang) or (thanh hoa)) cong dan than cau*.