Perhaps you should try some spelling variations:
recognizing string » recognizing strong, recognizing standing, recognizing seizing
springer kremser » springers grosser, springer brenden, springer einer
bringen eine » bringen ein, erbringen eine, springen eine
string ph.d » string php, string phase, gehring ph.d

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: ((springer kremser) OR (bringen eine)), recognizing string ph.d. research.
• Adding a wildcard symbol may retrieve word variants: ((springer kremser) or (bringen eine)), recognizing string ph.d. research*.