Perhaps you should try some spelling variations:
"heinrich heinz" » "heinrich heine", "heinrich heines", "heinrich hertz"
"heinrich keine" » "heinrich heine", "heinrich heines", "heinrich krone"
"heinrich henne" » "heinrich heine", "heinrich heines", "heinrich hensel"

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: (("heinrich heinz") OR ((("heinrich keine") OR ("heinrich henne")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"heinrich heinz\") or (((\"heinrich keine\") OR (\"heinrich henne\"))))".
• Removing quotes may allow a broader search: (( heinrich heinz ) or ((( heinrich keine ) OR ( heinrich henne )))).
• Adding a wildcard symbol may retrieve word variants: (("heinrich heinz") or ((("heinrich keine") OR ("heinrich henne"))))*.