At times google showers you with senseless links.
A tensor is just a generalization of a vectors and matrices, so might be the distracting search term?
Though I've just put "tensors-based corpora NLP research" in DuckDuckGo and all the first page of (non-Ad) hits look to be on-topic.
Can you be more specific about what you are hoping to find, or why you are searching. You mention homework, so are you after a textbook? "examples" means coding examples? Searching for "corpora NLP" on oreilly.com gets 993 hits, 944 of them books.
Darren