is it possible to find 2 words that makes a sentence unique out more sentences?

For example these are 3 dutch sentences:

1. 's Avonds doe ik mijn ring af. lk leg het altijd op de kast
2. Aaliyah pakt eerst een kopje koffie. Daarna gaat ze naar school
3. Aaron gaat donderdag op reis. Hij vindt dat leuk

De word "ring" is only in sentence 1. It isn't in the other sentences. So i can identify sentence 1 by its word "ring". Is it possible to make a combination of 2 words that makes it unique to identify a sentence.

I have devide every word of each sentence in its own Excel column. Is there a way to select f.e. 2 words from a sentence and that excel shows me if they are unique?

Gr. P