Have you considered looking for hand references separately? It is possible to combine refs, you know also, maybe it would be easier to find what you're looking for if you decided on a specific style of combat instead of just "using bare hands". If it's a bar fight you're trying to draw, type in "bar fight", if it's kickboxing type in "kickboxing". And so on.
Take a look at Posemaniacs.com, they have a relatively large fighting post section - and it's nice because you can rotate the models to find the angle you're looking for. You could also go on Youtube and watch sparring matches and pause it whenever you see a move you like. Nothing against ~sagestrike2, but anime fighting poses are hugely incorrect anatomy wise (generally) - if only because the nature of a cartoon is exaggeration. I'd advise sticking with actual human anatomical poses is you're looking for reference.
A way I find different poses when it comes to drawing is I go to bing and look up anime poses, then add whatever topic im looking for. If you're looking for fighting poses it would be 'anime fighting poses.' Even if youre not an anime artist, it is still a good base in order to understand the human anatomy.