If you want to feature on SERPs for multiple keywords, then you accordingly have to plan your whole campaign and target keywords phase-wise. For ex. in the first phase, you can target some long-tail keywords and then zero in on some of the short-tail keywords with better search density. Targeting long-tail keywords will ensure that you sustain the competition and the position for the competitive keywords…
Indexing is different from Ranking. You need to concentrate on keyword rankings by focusing on various link-building methods and on-page optimization. And all together you need to be patience.