Perhaps you should try some spelling variations:
chuc danh » chuc nganh, thuc hanh, chuc nang
chua xang » chua nang, chuc nang, chu bang
hanh tang » hanh trang, anh tang, hanh mang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
va hang » van hang, va lang, va hanh
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chuc danh) or (chua xang)) - hanh tang ((va hang) OR (va nang)) cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc danh) OR (chua xang)) - hanh tang ((va hang) OR (va nang)) cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc danh) or (chua xang)) - hanh tang ((va hang) OR (va nang)) cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc danh) or (chua xang)) - hanh tang ((va hang) OR (va nang)) cong san toan ban*.