Here is a link where you are able to search the Tipitaka for the word.
Sorry, link with double “http://http://….” causing the error, corrected the above link.
The link above search for the word “hadaya”.
You can narrow down by clicking : Anya, or Tīkā or Aṭṭhakathā and/or Tipitaka (Mūla) as shown below the item found:
Anya (16)
Tīkā (14)
Aṭṭhakathā (6)
Tipitaka (Mūla) (1)