How can I expand on the search to search within a specific project field?

I want to enable a more granular search/filter capability of specific project fields.  I tried implementing the Advance WP Query Search Filter but I could not discern which fields relate to the various Project input boxes.  The plugin listed fields: aq_block_1, aq_block_2, funder, funding_amount, reward, update, datum, but I’m not sure what these are.  I want to search based on Author, Title, Body Text, Update Text, Staff Pick, Experpt.  Are you able to elaborate on the fields I should be using? 

Thank you