I have several of ad groups and average about 500 keywords for each ad group but out of those 500 keywords, only 30 or so are actually getting viewed, the other ones have a normal status but 0 views.
It can't be because my CPC is to low because the max cpc is very high, and it can't be because my daily budget is to low because I've never got close to it, and these keywords have been in the ad group for more than two weeks, some for a couple of months.
Showyourpic, I'd really suggest contacting AdWords support - as it really difficult to pinpoint the cause without seeing your account.
If I had to guess, I'd say it had to do with some keywords being duplicates of others. For example, in the eyes of the system all of these keywords below are the same. If you had all three, it's quite possible that only one of them would ever get impressions: