Any way to reach 500 views per WEEK?
Claro que sim.
With the number of hubs you have, and the time that you have been on this site, you should be seeing at least that many views per day.
If you need to learn more about driving traffic, read http://hubpages.com/forum/topic/123438 Also, look up SEO. There is a good hub by Writer Fox to explain how to use it to increase traffic.
Also, although your hubs are good I think you need a lot more of them. When Google sees a decent number of hubs to a subdomain they are more likely to drive traffic to it, that is, place it higher in the SERPs. (Do you study in São Paulo? There are Americans arriving there that need to know how to get around, find taxis, etc. Write hubs that will help those people and the traffic will follow.)
The Pinterest and YA traffic is nice but social media is not usually enough. Do a lot more work with SEO so that the search engines will drive traffic to your hubs.