Perhaps you should try some spelling variations:
"renewable sources development update rate" » "renewable source development update rate", "renewable resources development update rate", "renewable forces development update rate", "renewable sources development update rule", "renewable sources development update cote", "renewable sources development update note"
"der software development strategy step" » "adept software development strategy step", "free software development strategy step", "a software development strategy step", "der software development strategy steps", "der software development strategy stop"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("der software development strategy step") or ("renewable sources development update rate"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("der software development strategy step") OR ("renewable sources development update rate"))*.
• Removing quotes may allow a broader search: (( der software development strategy step ) or ( renewable sources development update rate ))*.