I have imported Datalogics maven sample source project in eclipse but don't know how to find the word and add them to print range and print specific pages that contain certain word
Have you contacted my company's Support department (tech_support@datalogics.com) already? If not, you should do so to get more direct expert assistance.
The Java sample ListWords illustrates how to find the words on a page, iterate through that list of words, and retrieve the text. The PrintPDF sample illustrates how to specify a range of pages to print and how to print a document. Examining these two samples would be helpful to see how you could selectively choose pages to print based on trigger words you find on those pages.