Victor,
On a non HFY related thread, I thought you might be interested in Yuen Kay-San's first 5 methods, (first recorded privately in China in the 1930s and printed in HK in the 70s). They're as follows:
Join (connect with the opponent's bridges)
Intercept (cut off the opponent's offense)
Sink (destroy the opponent's defense)
Dart (deliver your offense)
Stick (maintain contact to determine continuation)
Not sure if this may help with your process of looking for similarities.