Perhaps you should try some spelling variations:
tuan trong » thuan trong, quan trong, tran trong
hieu cach » hieu cac, chieu sach, hieu ca
thanh tra » thanh toan
thanh hoa » thanh pho
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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: doc hieu cach - ((((thanh tra) OR (thanh hoa))) OR (thanh san)) tuan trong cong dan khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu cach - ((((thanh tra) OR (thanh hoa))) or (thanh san)) tuan trong cong dan khan cap~".
• Adding a wildcard symbol may retrieve word variants: doc hieu cach - ((((thanh tra) OR (thanh hoa))) or (thanh san)) tuan trong cong dan khan cap*.