Thanks to all who have wrote here. With the help of all of you and some others, I found a list of the minimal pairs listed above. I am going to share it here:
warn/warm (/wɔːrn/ , /wɔːrm/)
corn/corm (/kɔːrn/ , /kɔːrm/ )
tern or turn/term (/tɜːrn/ , /tɜːrm/)
burn/berm (/bɜːrn/, /bɜːrm/)
barn/barm (/bɑːrn/, /bɑːrm/)
dern/derm (/dɜːn/ ,/dɜːm/ )
sworn/swarm (/swɔːrn/ , /swɔːrm/)
norn/norm (/nɔːrn/ , /nɔːrm/)
spurn/sperm (/spɜːrn/, /spɜːrm/)