There a few ways of getting those c11 & c12 manual by farming, buying off from stand, auction and using spirit of kunlun to create those 100% c11 & c12 manual and it does not create the manual that you wish. All depend on your luck if you wish to create by using spirit of kunlun. Hope this will help you.
There is no c11, c12 book for ,,trap" skill. Best way to receive skill book is to grind at red gcm/beast, mob drop books often there.
I hear from others in game that ch10 is as high as traps lvl to, maybe im wrong but there are no ch11 ch12 skill books for any clans in clans base from npcs, again it maybe an ingame bug . Best thing to do is contact support and see what there reply is.