Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh hanh » trinh thanh, trinh han, trinh anh
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
theo chu » theo chieu, cho chu, chao chu
chu tach » chu tich, chu thich, chu thanh
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu tach - hanh trinh hanh ((nhung cong) OR (dung cong)) dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu tach - hanh trinh hanh ((nhung cong) OR (dung cong)) dan ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu tach - hanh trinh hanh ((nhung cong) OR (dung cong)) dan ((toan cao) or (toan ban))*".