Perhaps you should try some spelling variations:
"sir thomas richardson, 1st baronet" » "sir thomas richards, 1st baronet", "sir james richardson, 1st baronet", "sir thomas richardson, 1st baron", "sir thomas richardson, luss baronet"
"sir thomas richardson, colt baronet" » "sir thomas richards, colt baronet", "sir james richardson, colt baronet", "sir thomas richardson, holte baronet", "sir thomas richardson, cox baronet", "sir thomas richardson, cobb baronet"
"sir thomas richardson, first baronet" » "sir thomas richards, first baronet", "sir james richardson, first baronet", "sir thomas richardson, first barrier", "sir thomas richardson, first tyrone"
"sir thomas dickson, 1st baronet" » "sir thomas jackson, 1st baronet", "sir thomas dawson, 1st baronet", "sir thomas denison, 1st baronet", "sir thomas dickson, 1st baron", "sir thomas dickson, luss baronet"
"sir thomas dickson, 1st baroness" » "sir thomas jackson, 1st baroness", "sir thomas dawson, 1st baroness", "sir thomas denison, 1st baroness", "sir thomas dickson, 1st baron", "sir thomas dickson, _ baroness"
"sir thomas richard, 1st baronet" » "sir thomas richard, 1st baron", "sir thomas richard, luss 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, colt baronet"))) OR ("sir thomas richard, 1st baronet"))) OR ("sir thomas richardson, first baronet"))) OR ((("sir thomas dickson, 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, colt baronet\"))) or (\"sir thomas richard, 1st baronet\"))) or (\"sir thomas richardson, first baronet\"))) or (((\"sir thomas dickson, 1st baronet\") or (\"sir thomas dickson, 1st baroness\"))))".
• Removing quotes may allow a broader search: (((((((( sir thomas richardson, 1st baronet ) OR ( sir thomas richardson, colt baronet ))) or ( sir thomas richard, 1st baronet ))) or ( sir thomas richardson, first baronet ))) or ((( sir thomas dickson, 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, colt baronet"))) or ("sir thomas richard, 1st baronet"))) or ("sir thomas richardson, first baronet"))) or ((("sir thomas dickson, 1st baronet") or ("sir thomas dickson, 1st baroness"))))*.