Perhaps you should try some spelling variations:
scientific exploration » scientific explanation, scientific collaboration, scientific information
scientific application » scientific applications, scientific publications, scientific explanation
aerial voyages » aerial voyage, aerial images

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: "((\"european AND aerial voyages of scientific exploration\") or (\"european AND aerial voyages of scientific application\"))".
• Removing quotes may allow a broader search: (( european and aerial voyages of scientific exploration ) or ( european and aerial voyages of scientific application )).