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I'm not sure if I found the root cause of my problem... so let me ask you all if you have heard it before: After change my website to include the Moz improvement suggestions, I logged in Google Webmaster Tools and ran "Fetch as Google" option and then submitted to index. But, after 5 or 10 minutes, I discovered a small problem on my page and, after fix it, I ran the "Fetch as Google" again and submitted to index. Probably Google interpreted this two submissions as a "Black SEO" and punished my website? Btw, according to Moz Rank Tracker, I'm the 5th result for the keyword I want. Thank you all in advance. Best regards

This is a huge topic. If I was going to attack this... I would consider that you are talking about one variety of "PMS" or a "practice mangement software".  These are available for physicians, dentists, attorneys, accountants and many other types of professionals.  There are also management systems for blue collar industries. For this project my primary keyword would be "Medical practice management software" and then "system" or "solution" can be used as an add-on. A content attack on this could begin with an in-depth article of a few thousand words with photos, illustrations and art that depict screenshots, document samples, flow charts, data entry devices, portable data entry stations, etc. Think about some of the awesome posts that you see on the moz.com blog or a big wikipedia article. The typical PMS has many different abilities that are often sold as modules.  Their functions include appointment scheduling, insurance submission, billing, patient record management and many other facets.  Each of these many functions could be another page optimized for longer tail keywords that each have very monetizable search volume such as "medical billing software" and "patient record management system". Data entry devices and mobile data entry units can be several more content pages, each with substantive text, photos, screenshots and more.  Then there are decisions about having the software on a server in your office or a web-based solution.  Each has its advantages and disadvantages in terms of how you pay for it, updates, security and the types of equipment that is needed for your office - plus the level of on-site expertise that will be needed. Most people are trying to attack this, what might be a billion dollar industry, by tossing pages at it.  I would attack this niche with an entire website full of this stuff along with comparison charts of competing products and vendors.  The company who is willing to invest a  thousand person hours into a website like this... and then dedicates a good person to spend 1/2 of her/his time on keeping it updated could haul in buckets of dough.... and when they are finished with the physican's part they move right into the dental PMS market using the same template.