Welcome to FT!
Do I understand correctly that you would like to fly something like this itinerary:
IAH-DYU 18 Sep
DYU-KUL 25 Sep
KUL-IAH 26/27 Sep
All possibly with stops?
This is going to be extremely expensive and I suspect the cheapest way to do it is to buy a RTW (Round the World) ticket, either with Star Alliance (probably best) or OneWorld. I expect you would pay ca $5,000.