How do I look up a Greek word in the Thayer's Lexicon, since the keyboard for searching for a word doesn't have the Greek alphabet on it?

Thayer's is organized as a strongs dictionary, so you can look things up by strongs number (i.e. G1234).  Bust most words also have an english transliteration, so you can search for, say "Abel" to get to the greek word (G6).  Searching will search the full text of the definition, so you can usually find a word by the transliteration, or by using wildcards, such as "agatho?".