You can easily filter your existing searches by specific keywords.
STEP 1: Go to Search Results by clicking on the second icon in the menu on the upper-left part of your screen.
STEP 2: In the search bar (right above the list of your searches) enter the desired keyword.
STEP 3: Hit Enter, or click on the magnifying glass in the rightmost part of the search bar.
Now your list will be populated with the most relevant search results containing the keyword(s) you’ve typed in.