Perhaps you should try some spelling variations:
lanh tranh » lan tranh, hanh trinh, sach tranh
doi chinh » do chinh, tai chinh, hoc chinh
lanh manh » lan anh, van manh, anh anh
dung cong » dung trong
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, 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: doi chinh sach - ((((lanh manh) OR (lanh tranh))) or (canh tranh)) qua dung cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chinh sach - ((((lanh manh) OR (lanh tranh))) OR (canh tranh)) qua dung cong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chinh sach - ((((lanh manh) OR (lanh tranh))) or (canh tranh)) qua dung cong dan than cao".
• Adding a wildcard symbol may retrieve word variants: doi chinh sach - ((((lanh manh) OR (lanh tranh))) or (canh tranh)) qua dung cong dan than cao*.