Perhaps you should try some spelling variations:
extending scientific » attending scientific, expanding scientific, extended scientific
scientific alien » scientific patient, scientific belief, scientific action
german specific » germany specific, german specificity, germline specific
alien flights » air flights, line flights
ontology » cytology

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: (( extending scientific alien flights ) OR ( german specific ontology flights )).
• Adding a wildcard symbol may retrieve word variants: (( extending scientific alien flights ) or ( german specific ontology flights ))*.