What's The Best Way To Search For Highly Competitive Domain Name Keywords!

I’ve tried a lot of website’s & software programs trying to find a good
keyword in a vary competitive market & there not showing much.

What’s some of the best website’s or software programs that are trust worthy.

That also allows you to put in different keyword combinations for
.com & .net domains that are not on a high priced auction site.

I normally use my marketsamurai for this. The result is pretty fine. I’ve made some good conversion using the said tool.

Does it let you search just for domain coupons or available names from the keywords in it.