the word to be unscrambled is dtervaiga

Try these:

http://wordsmith.org/anagram/

http://www.unscramble.net

http://freespace.virgin.net/martin.mamo/anagram.html

http://www.utsire.com/anagrams/

http://www.wordsmyth.net/home.php?content=anagram

http://www.crossword-dictionary.com/anagram.asp

http://www.lexigram.net/anagram-solver/index.php?s=crydabu&t=1000&