Perhaps you should try some spelling variations:
"chilean educational books" » "chinese educational books", "lean educational books", "can educational books", "chilean educational bodies", "chilean educational basis", "chilean educational board", "children educational books", "child educational books"
"chilean education books" » "children education books", "child education books", "lean education books", "chilean education bodies", "chilean education textbooks", "chilean education handbooks"

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: "((\"chilean educational books\") OR (\"chilean education books\"))".
• Removing quotes may allow a broader search: (( chilean educational books ) OR ( chilean education books )).
• Adding a wildcard symbol may retrieve word variants: (("chilean educational books") OR ("chilean education books"))*.