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