document index

 i inserted an html document in a text box then i extract text between html tags within this document 
in another textbox

if the text is "search engines use a ranking algorithm to determine the order"
now i want to break the text in this form
search
engine
search engine
use
search engine use
ranking
search engine ranking 
algorithm 
search engine ranking algorithm
and i want to check if the next string is stopwords or not 
if it's i want to remove it
thank u

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