Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
toan cau » toan tap, toan tai
toan ban » van ban
toan cao » toan tap
ho diep » hong diep, cho dieu
va dung » van dung, va duong, vat dung

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

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