Strong rankings in Yahoo/Bing but weak in Google?

So for the past month I have been promoting a website that is doing really well in Yahoo and Bing, two keywords are in the top 10. However when it comes to Google I do not see any of them in the top 100.

Wanna know if people have any thoughts or if they could help me with some tips.

Thanks Guys

Where you see yourself in Yahoo/Bing is where you should be seeing yourself in Google. The problem is your not because Google is manipulating the serps to suit themselves. I see most of my keywords on the 1st page for Yahoo/Bing and in the top 3 positions but i Google im not where i want to be but i should really be where Yahoo/Bing says i am currently.

Google, Bing and Yahoo use different algos, that's the point. I believe it's more an accident to see the same positions in these SEs.
Check your website using google webmaster guidelines. Is your content good enough? What about the backlinks? Keyword density, title, etc? Also the competition in that niche matters too.