Thanks to Michael Kristner for detective/deductive work to identify these movies, which I had recently entered in a big batch of movies, as alternate titles of existing movies :

"Yoga Kung Fu is Kung Fu Vs. Yoga (79)

Golden Snake Sword must be Swift Sword (80)

Underworld is Black Guide (73)

When the Lion Roars is Lion's Heart (72)

Death Duel is The Death Duel (72)(nice movie)

Kung Fu Expert is very likely Dirty Kung Fu

Chinese Chieh Chuan Kung Fu is Legend of Bruce Lee (no
BIG5 title, now thanks to you we find one)

Gold Dagger Romance is a Tsui Hark TV Serial of 1978.
"