Perhaps you should try some spelling variations:
"sir james nicholson, first baronet" » "sir james richardson, first baronet", "sir james nicholson, first barrier", "sir james nicholson, 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 baroness", "sir thomas dickson, colt baronet", "sir thomas dickson, luss baronet"
"sir thomas dickson, 1st baron" » "sir thomas jackson, 1st baron", "sir thomas dawson, 1st baron", "sir thomas denison, 1st baron"

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 james nicholson, first baronet") OR ((("sir thomas dickson, 1st baronet") OR ("sir thomas dickson, 1st baron")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"sir james nicholson, first baronet\") or (((\"sir thomas dickson, 1st baronet\") OR (\"sir thomas dickson, 1st baron\"))))".
• Removing quotes may allow a broader search: (( sir james nicholson, first baronet ) or ((( sir thomas dickson, 1st baronet ) OR ( sir thomas dickson, 1st baron )))).
• Adding a wildcard symbol may retrieve word variants: (("sir james nicholson, first baronet") or ((("sir thomas dickson, 1st baronet") OR ("sir thomas dickson, 1st baron"))))*.