Perhaps you should try some spelling variations:
preservation protocols » reservation protocols, presentation protocols, conservation protocols
reservation protocol » generation protocol, regeneration protocol, resolution protocol
function classes » functional classes, foundation classes, function analyses
classes livres » class lives, classes lidis, classes irks

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: information ((preservation protocols) OR (reservation protocol)) function classes livres~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information ((preservation protocols) OR (reservation protocol)) function classes livres".
• Adding a wildcard symbol may retrieve word variants: information ((preservation protocols) OR (reservation protocol)) function classes livres*.