Perhaps you should try some spelling variations:
"scientific activities" » "scientific activity", "specific activities", "scientific societies"
"scientific articles" » "scientific principles"
"science societies" » "science society", "sciences sociales", "science science"

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: (((((("scientific activities") OR ("scientific articles"))) OR ("science societies"))) OR ("scientific studies")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"scientific activities\") OR (\"scientific articles\"))) or (\"science societies\"))) or (\"scientific studies\"))".
• Removing quotes may allow a broader search: (((((( scientific activities ) OR ( scientific articles ))) or ( science societies ))) or ( scientific studies )).
• Adding a wildcard symbol may retrieve word variants: (((((("scientific activities") OR ("scientific articles"))) or ("science societies"))) or ("scientific studies"))*.