"Article writing using AdWords"? Perhaps you mean, content marketing to make money from AdSense. If you want to learn content marketing or writing articles to make money with AdSense, try searching for "content marketing for beginners".

have a keyword linked to your article title. put multiple keywords 3 times inside your article.

to get keyword ideas go to google keyword tool. enter the keywords you want.

choose keyword search traffic above 500 and below 1000 searches.
select the keyword with the above traffic and insert the keywords in your articles.

good luck