In Google sheets, how do I have a cell return the value of cell A, based on the values of cells B, C and D?

I'm trying to make a simple database that returns a value based on a number of different criteria.

Here is the Search Page they'll use to access the data:

They choose from one or more criteria in row 2 (text types, up to three tags, or reading level); all other cells will be protected. I want their results to appear in a list from A3 down (I've already set up the sheet to populate the rest of the rows based on the data in the A column).

Here is the Database so far. I want the Search page to draw from column A, based on the criteria in the text types, tags, and/or reading level columns.

Any assistance would be greatly appreciated!