Perhaps you should try some spelling variations:
3a apache » 33 apache, 3.2 apache, 3.6 apache
a apache » _ apache, 4 apache, 5 apache
3 apache » _ apache, 4 apache, 5 apache
1 apache » _ apache, 4 apache, 5 apache
resource » ressource
resources » ressources

Try widening your search to All Fields.

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: %22spark %((electronic resource) OR (((electronic resources) OR (electronic devices)))) %((((3a apache) OR (a apache))) OR (((3 apache) OR (1 apache)))) software foundation%29%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22spark %((electronic resource) or (((electronic resources) or (electronic devices)))) %((((3a apache) OR (a apache))) or (((3 apache) or (1 apache)))) software foundation%29%22".
• Adding a wildcard symbol may retrieve word variants: %22spark %((electronic resource) or (((electronic resources) or (electronic devices)))) %((((3a apache) OR (a apache))) or (((3 apache) or (1 apache)))) software foundation%29%22*.