I am working on a social networking site "www.lookchup.com" last two month but my keyword not index, anyone can suggest me "how to index my keyword?"

If it doesn't show up then, unfortunately, it's not indexed for that search term. Simply go back and place that keyword somewhere else in your title or bullets or search terms. Then continue to repeat this process until your product listing is indexed for all relevant/high volume keywords on your keyword list.

hello,
Rank your Keyword in 10 Steps

Step 1: Lay the Groundwork
Step 2: Do Your Initial Keyword Research
Step 3: Check Out the Competition
Step 4: Consider Intent
Step 5: Conceptualize the Content
Step 6: Execute
Step 7: Optimize for Your Keyword
Step 8: Publish
Step 9: Promote
Step 10: Analyze