Perhaps you should try some spelling variations:
"german scientific ontology flights" » "german specific ontology flights", "german centric ontology flights", "german scientific outlook 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 action flights", "berlin scientific age flights", "berlin scientific air flights", "berlin scientific line flights"
"berlin scientific belief flights" » "borodin scientific belief flights", "version scientific belief flights", "bazin scientific belief flights", "berlin scientific basis flights", "berlin scientific bases flights", "berlin scientific base flights", "berlin scientific belief insights"

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