using Domain Alias for better SEO?

lets say my current website is about downloading donkey balls and the website is called DonkeyBalls4Free.com
now since its actually about Downloading Free Donkey Balls, i now bought myself new domain DownloadFreeDonkeyBalls.com
and my question is: if I use a free service called domain alias, redirect DownloadFreeDonkeyBalls.com to> DonkeyBalls4Free.com
can this be good for SEO lets say in a case where a person googles "download free donkey balls" ?

what are the best practices using multiple domain names for one website for better SEO?

i am interested in this too

it is great seo technique and google webmaster tools allow you to combine two domain so it doesn't double index etc. It would get you extra organic traffic.

I am getting some conflicting asnwers, anyone with experience?
Lets say its bad for SEO, whats it for then, the domain alias?

HI,
IMO, you will have two domains, you will have to work on one that is more related to what you want to do.
And redirect users coming from the other domain to your original domain. In SEO point of view there will be double work as both will seo needed on them. The other one will just serve as a referring site. So, its not harmful. But its better to stick with one domain.

ZMakarov said:

HI,
IMO, you will have two domains, you will have to work on one that is more related to what you want to do.
And redirect users coming from the other domain to your original domain. In SEO point of view there will be double work as both will seo needed on them. The other one will just serve as a referring site. So, its not harmful. But its better to stick with one domain.

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This is basically what i've heard from pros.

I've been told it'd be better to go with :

keyword1.com/keyword2.html

vs.

keyword1.com
keyword2.com