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)
"enrich hein" » "enrich hin" (Expand Search), "enrich vein" (Expand Search), "enrich hsin" (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 ((((("enrich heinz") OR ("enrich hein"))) OR ("enriched heinz"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"heinrich heinz\") OR (((((\"enrich heinz\") OR (\"enrich hein\"))) OR (\"enriched heinz\"))))*".
• Removing quotes may allow a broader search: (( heinrich heinz ) OR ((((( enrich heinz ) OR ( enrich hein ))) OR ( enriched heinz ))))*.