See the search box at the top left? It’s now broken, at least for many Blogger blogs. Results are often spotty and sometimes non-existent. The problem has become a known issue.
Until the problem’s fixed, you can search a Blogger blog by doing a Google site search, like so:
site:mleddy.blogspot.com keyword keywordYou can search for individual words or for phrases in quotation marks, as with any Google search.