Perhaps you should try some spelling variations:
"heinrich heinz" » "enrich heinz" (Expand Search)
"hsinrich hsinz" » "zheinrich hsinz" (Expand Search), "henrich hsinz" (Expand Search), "hinrichs hsinz" (Expand Search), "hsinrich hsing" (Expand Search)
"hsinrich hsin" » "zheinrich hsin" (Expand Search), "henrich hsin" (Expand Search), "hinrichs hsin" (Expand Search)
"hsienrich hsien" » "henrich hsien" (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 ((("hsinrich hsin") OR ("hsienrich hsien"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"heinrich heinz\") OR (\"hsinrich hsinz\"))) OR (((\"hsinrich hsin\") OR (\"hsienrich hsien\"))))".
• Removing quotes may allow a broader search: (((( heinrich heinz ) OR ( hsinrich hsinz ))) OR ((( hsinrich hsin ) OR ( hsienrich hsien )))).
• Adding a wildcard symbol may retrieve word variants: (((("heinrich heinz") OR ("hsinrich hsinz"))) OR ((("hsinrich hsin") OR ("hsienrich hsien"))))*.