Hi Ali,
Your ranking is directly related to your content, on-page optimization and off-page optimization (link popularity). So if you want your pages start ranking for different variations of a keyword, you should be adding content related to these variations (each page targeting one keyword / phrase), you should be doing the on-page optimization keeping the emphasis on the targeted term for that page and placing it in places like title, description, H1 and other heading tags (H1 is recommended and others are optional), page's content (along with few tightly related variations to the targeted term. The keyword density can be around 1% in the article content of the page i.e. excluding to the term present in the other crawlable content like, the meta information, image attributes etc), in the anchor text of your internal links, in the image names, image titles, image alt text, bolding, italicizing the term in text etc and in your link building activity with approximates 20 to 25 % with exact term as an anchor.
For your second question, you can submit a sitemap through Bing webmaster tools account.
Hope these help.
By the way, any particular reason whey you used the term, "buy cocks" as an anchor in majority of your backlinks??
Best regards,
Devanur Rafi.