where Aristotle talks of "oregestai" and "orme'"
(tendency) of matter towards form? Where does he use
these exact words

I suggest that you consult the Perseus Digital library of texts at:
http://www.perseus.tufts.edu/
Click on 'Classics' then search the Aristotle texts in either Greek or English.
I believe that you wil find the most productive results in the
Metaphysics and the early books of the Physics.

I'm not a google researcher so this is a freebie.
I imagine that you would have to pay more if you want a resrearcher to
answer this question for you.