Perhaps you should try some spelling variations:
"heinrich heinz" » "hinrich hinz" (Expand Search), "veinrich veinz" (Expand Search), "hsinrich hsinz" (Expand Search)
"heinrich hein" » "hinrich hin" (Expand Search), "veinrich vein" (Expand Search), "hsinrich hsin" (Expand Search)
"enrich heinz" » "enrich hinz" (Expand Search), "enrich veinz" (Expand Search), "enrich hsinz" (Expand Search)
"enriched heinz" » "enriched hinz" (Expand Search), "enriched veinz" (Expand Search), "enriched hsinz" (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 ("heinrich hein"))) OR ((("enrich heinz") OR ("enriched heinz"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"heinrich heinz\") OR (\"heinrich hein\"))) OR (((\"enrich heinz\") OR (\"enriched heinz\"))))*".
• Removing quotes may allow a broader search: (((( heinrich heinz ) OR ( heinrich hein ))) OR ((( enrich heinz ) OR ( enriched heinz ))))*.