what if I place a complete 7 word title on google and the site dont show, what could be the problem
The question is about unique text that will only occur on your site. Not necessarily a title, just any connected phrase. If an exact-text search doesn't bring up your page it means the page hasn't been indexed. You would then need to figure out if you've inadvertently (a) prevented search engines from crawling or (b) put "noindex" on all pages or (c) done something so evil, your site is excluded outright from search results.
But you've said this does not happen, so you need not worry about it.
You next need to consider what your main keyword is. If it's "cats"* or "money"** or "keyword"*** or "bzzt"**** you are out of luck. In fact you'd be hard pressed to come up with any
one English word that gets less than 1000 hits total. It isn't enough to be good; you have to be better than everyone else.
* "About 101,000,000 results."
** "About 617,000,000 results."
*** "About 194,000,000 results", with WebmasterWorld not in the top 30 for me :(
**** Keyword I would like to rank for but don't: "About 2,390,000 results."