Perhaps you should try some spelling variations:
"sir thomas richardson, 1st baronet" » "sir thomas richards, 1st baronet", "sir thomas richard, 1st baronet", "sir james richardson, 1st baronet", "sir thomas richardson, 1st baron", "sir thomas richardson, first baronet", "sir thomas richardson, colt baronet"
"sir thomas richardson, first barrier" » "sir thomas richards, first barrier", "sir thomas richard, first barrier", "sir james richardson, first barrier", "sir thomas richardson, coast barrier"
"sir thomas dickson, 1st baronet" » "sir thomas jackson, 1st baronet", "sir thomas dawson, 1st baronet", "sir thomas dixon, 1st baronet", "sir thomas dickson, 1st baron", "sir thomas dickson, first baronet", "sir thomas dickson, colt baronet"
"sir thomas dickson, 1st baroness" » "sir thomas jackson, 1st baroness", "sir thomas dawson, 1st baroness", "sir thomas dixon, 1st baroness", "sir thomas dickson, 1st baron", "sir thomas dickson, _ baroness"
"sir thomas denison, 1st baronet" » "sir thomas davidson, 1st baronet", "sir thomas denman, 1st baronet", "sir thomas dawson, 1st baronet", "sir thomas denison, 1st baron", "sir thomas denison, first baronet", "sir thomas denison, colt baronet"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sir thomas richardson, 1st baronet") OR ("sir thomas richardson, first barrier"))) OR ((((("sir thomas dickson, 1st baronet") OR ("sir thomas denison, 1st baronet"))) OR ("sir thomas dickson, 1st baroness")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sir thomas richardson, 1st baronet\") or (\"sir thomas richardson, first barrier\"))) or (((((\"sir thomas dickson, 1st baronet\") OR (\"sir thomas denison, 1st baronet\"))) or (\"sir thomas dickson, 1st baroness\"))))".
• Removing quotes may allow a broader search: (((( sir thomas richardson, 1st baronet ) or ( sir thomas richardson, first barrier ))) or ((((( sir thomas dickson, 1st baronet ) OR ( sir thomas denison, 1st baronet ))) or ( sir thomas dickson, 1st baroness )))).
• Adding a wildcard symbol may retrieve word variants: (((("sir thomas richardson, 1st baronet") or ("sir thomas richardson, first barrier"))) or ((((("sir thomas dickson, 1st baronet") OR ("sir thomas denison, 1st baronet"))) or ("sir thomas dickson, 1st baroness"))))*.