Perhaps you should try some spelling variations:
"modern birkhauser classes" » "modern birkhauser plates", "peter birkhauser classes", "von birkhauser classes"
"modern brauer classes" » "modern broker classes", "modern wrapper classes", "modern proper classes", "modern brewery classes", "moderne frauen classes", "modern brazil classes"

Try widening your search to All Fields.

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: "((\"modern birkhauser classes\") OR (\"modern brauer classes\"))".
• Removing quotes may allow a broader search: (( modern birkhauser classes ) OR ( modern brauer classes )).
• Adding a wildcard symbol may retrieve word variants: (("modern birkhauser classes") OR ("modern brauer classes"))*.