Hello friend, I think when people ask for topics to be suggested they are proceeding the wrong way. First of all, it is easy to just google this: HRM research topics, list
If you google that, you will get a lot of topics!
But I think the best way is to ENJOY your reading. Just read some research articles that interest you. Make sure they are recent. Read recent articles, and it will be easy to notice the MOST IMPORTANT ISSUES TODAY. What are the most important HRM issues? I think you should wait until you find an article that fascinates you, and that might give you the GREAT IDEA you need for your own original research.