Perhaps you should try some spelling variations:
"relevant educational books" » "relevance educational books", "relevant education books", "relevant national books", "relevant educational bodies", "relevant educational basis"
"genevan educational books" » "general educational books", "deweyan educational books", "generic educational books", "genevan education books", "genevan educational bodies", "genevan educational basis"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"genevan educational books\") OR (\"relevant educational books\"))".
• Removing quotes may allow a broader search: (( genevan educational books ) OR ( relevant educational books )).
• Adding a wildcard symbol may retrieve word variants: (("genevan educational books") OR ("relevant educational books"))*.