QuiteRSS is the first app of this type I've ever used. I haven't found any docs covering my current problem.
When I do a search on Kijiji for travel trailers, I have no trouble adding that as a feed. If I then use the side panel filters to set a price range, distance from my location or other details the attempt to add the feed times out and fails. Is there any information available on how to overcome this, or is it a general limitation?