Perhaps you should try some spelling variations:
"jacobus henricus has 't hopf" » "jacobus hendricus has 't hopf", "jacob henriques has 't hopf", "jacobus merrick has 't hopf", "jacobus henricus hart 't hopf", "jacobus henricus harris 't hopf", "jacobus henricus baers 't hopf"
"jacobus fenwick has 't hopf" » "jacobus merrick has 't hopf", "jacobus fenwick bar 't hopf", "jacobus fenwick thomas 't hopf", "jacobus fenwick part 't hopf"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"jacobus fenwick has 't hopf\") OR (\"jacobus henricus has 't hopf\"))".
• Removing quotes may allow a broader search: (( jacobus fenwick has 't hopf ) OR ( jacobus henricus has 't hopf )).
• Adding a wildcard symbol may retrieve word variants: (("jacobus fenwick has 't hopf") OR ("jacobus henricus has 't hopf"))*.