Perhaps you should try some spelling variations:
"der software development update series" » "der software development strategy series", "der software development update beliefs", "der software development update service", "der software development update spring", "adept software development update series", "free software development update series", "a software development update series"
"et business development update modes" » "et business development strategy modes", "et business development update focus", "et business development update cote", "et business development update note", "let business development update modes", "best business development update modes", "east business development update modes"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("der software development update series") OR ("et business development update modes"))~.
• Removing quotes may allow a broader search: (( der software development update series ) or ( et business development update modes ))~.
• Adding a wildcard symbol may retrieve word variants: (("der software development update series") or ("et business development update modes"))*.