In music theory, if you can pick out the scale in the key you want: Do Re Me Fa So La Te Do, you can find any chord you want to make via putting together these 8 notes in different ways. First, we number the notes of the scale 1 through 8 (8 being the same note as 1, but an octive higher).
If you then put together the 1st, 3rd, 5th and 8th, you have the major chord. If you flat the 3rd in that combination, you have the minor chord. If you add a 7th, you have a minor 7th, flat that 7th and you end up with a 7th, sharp the 5th and you get an augmented....and so on.
Google probably has a chart somewhere that defines all the chords in this manner.
If you then put together the 1st, 3rd, 5th and 8th, you have the major chord. If you flat the 3rd in that combination, you have the minor chord. If you add a 7th, you have a minor 7th, flat that 7th and you end up with a 7th, sharp the 5th and you get an augmented....and so on.
Google probably has a chart somewhere that defines all the chords in this manner.