Keywords in domain name?

[Chris]

Hi, hope someone can help! I have a 3 word domain name and up until last week by typing the 3 words separately into google would bring up my site in the top 3 results but now it will only do it by typing in the 3 words as 1, can anyone suggest how I can sort this out as I am loosing traffic and money as a result of this. Please forgive me as my knowledge of this is quite limited.
Hi thanks for the replies, are we talking about Off-Page SEO? I am quite a beginner at all this, any backlink tips? Anything else that may help? Thanks again.

[b]

google changes its "algorithm often" so there is no definitive answer, since if there was we would all be at the top

[Samantha]

Make sure that your 3 word keyword and its variations is repeated in the content of your website as well. Mainly in the titles. Also you need to build quality links to your website with the same keyword and its variations.

Make sue not overuse the same exact keyword in both off site and in-site optimization as Google may punish you for this.

[Ethari]

its not good