Perhaps you should try some spelling variations:
"german scientific ontology flights" » "german specific ontology flights", "german scientific outlook flights", "german scientific methodology flights", "can scientific ontology flights"
"berlin scientific alien flights" » "borodin scientific alien flights", "version scientific alien flights", "bazin scientific alien flights", "berlin scientific patient flights", "berlin scientific belief flights", "berlin scientific action flights", "berlin scientific air flights", "berlin scientific line flights"
"german centric ontology flights" » "german generic ontology flights", "german semantic ontology flights", "german dynamic ontology flights", "german central ontology flights", "germany central ontology flights", "german contract ontology flights"

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: (("berlin scientific alien flights") OR ((("german scientific ontology flights") OR ("german centric ontology flights")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"berlin scientific alien flights\") or (((\"german scientific ontology flights\") OR (\"german centric ontology flights\"))))".
• Removing quotes may allow a broader search: (( berlin scientific alien flights ) or ((( german scientific ontology flights ) OR ( german centric ontology flights )))).
• Adding a wildcard symbol may retrieve word variants: (("berlin scientific alien flights") or ((("german scientific ontology flights") OR ("german centric ontology flights"))))*.