Perhaps you should try some spelling variations:
"heinrich heinz" » "enrich heinz" (Expand Search)
"heinrich hein" » "enrich hein" (Expand Search)
"hsinrich hsinz" » "zheinrich hsinz" (Expand Search), "henrich hsinz" (Expand Search), "hinrichs hsinz" (Expand Search), "hsinrich hsin" (Expand Search), "hsinrich hsing" (Expand Search)
"hinrich hin" » "hinrichs hin" (Expand Search), "henrich hin" (Expand Search), "hindrichs hin" (Expand Search), "thinrich thin" (Expand Search), "chinrich chin" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("heinrich heinz") OR ("hsinrich hsinz"))) OR ((("heinrich hein") OR ("hinrich hin"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"heinrich heinz\") OR (\"hsinrich hsinz\"))) OR (((\"heinrich hein\") OR (\"hinrich hin\"))))".
• Removing quotes may allow a broader search: (((( heinrich heinz ) OR ( hsinrich hsinz ))) OR ((( heinrich hein ) OR ( hinrich hin )))).
• Adding a wildcard symbol may retrieve word variants: (((("heinrich heinz") OR ("hsinrich hsinz"))) OR ((("heinrich hein") OR ("hinrich hin"))))*.