This set specifically has some of the most pertinent terms for beginners. I've simplified the phonetic spellings of the sounds, so as not to confuse beginners too much. For more accurate, but difficult pronunciations, check out this other set - http://quizlet.com/14780350/karen-basic-conversational-flash-cards/
The Karen (Kuh-ren) people are a tribal ethnic minority based primarily in Burma and Thailand. Here is some basic Karen vocabulary, spelled out phonetically (as opposed to the Karen proprietary characters).