Microsoft Knowledge API - Searching for a sentence in the database

I'm trying to integrate the new Microsoft Knowledge API to my app. I need to search in the database to find results similar to a google/bing search.

So far I've made this request - and its working well:

https://westus.api.cognitive.microsoft.com/academic/v1.0/evaluate?expr=And(W=%27bandwidth%27)&attributes=Id,Ti,Y,D,CC,E&subscription-key=MY-API-KEY

According to the documentation W argument is searching only in the title and the abstract, I need to search at the whole paper.

How can i query a sentence from the database?