i have a website www.mypetsloveitonline.com and i want to buy other domain names and direct them to my main page (referral link)…how can I use them to help me in my marketing?

i want to buy domains like organicdogtreat.com, tastydogtreats.com, etc (all taken) and build up my rank score, actually i just want people to buy, cuz they are good produts…should I have hosting for each domain name with the same layout of my current website and then submit them to directories, google (adwords) etc. or is this going to create a conflic of some type?