Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
luan phung » luan phuong, luan chung, luan phong
bien tinh » bi tinh, yen tinh, diep tinh
cong dan » cong tan, cong dong, cong tac
cong san » cong tac
than tap » toan tap, han tap, phan tap
ho bien » pho bien, hoa bien, so bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho bien tinh - hanh trinh luan phung ((((cong dan) OR (huong dan))) or (cong san)) than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho bien tinh - hanh trinh luan phung ((((cong dan) OR (huong dan))) OR (cong san)) than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho bien tinh - hanh trinh luan phung ((((cong dan) OR (huong dan))) or (cong san)) than tap".
• Adding a wildcard symbol may retrieve word variants: ho bien tinh - hanh trinh luan phung ((((cong dan) OR (huong dan))) or (cong san)) than tap*.