sometimes 2-words and 3-words

for example:

credit card

visa card

I need help please 

How I can show my output for my program as web page 

I found this function when i used there are error can someone explain this function how it work

 if (w.count >4)

after this step i want to save it in text file 

I am new user for this software I need to read text file line by line 

and I need to draw the relationship between word as graph where nodes represent words and