Perhaps you should try some spelling variations:
"european and american voyages of scientific exploration" » "european and american voyages of scientific explanation", "european and american voyages of scientific application", "european and american voyages of scientific collaboration", "european and american villages of scientific exploration", "european and aerial voyages of scientific exploration", "european and african voyagers of scientific exploration"
"European and American voyages of scientific computation" » "European and American voyages of scientific communication"

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 american voyages of scientific exploration") OR ((("European and American voyages of scientific computation") OR ("European and American voyages of scientific computing")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"european and american voyages of scientific exploration\") or (((\"European and American voyages of scientific computation\") OR (\"European and American voyages of scientific computing\"))))".
• Removing quotes may allow a broader search: (( european and american voyages of scientific exploration ) or ((( European and American voyages of scientific computation ) OR ( European and American voyages of scientific computing )))).
• Adding a wildcard symbol may retrieve word variants: (("european and american voyages of scientific exploration") or ((("European and American voyages of scientific computation") OR ("European and American voyages of scientific computing"))))*.