You are dealing with two different needs for adapters. First you have two headsets that each have separate earphone and microphone jacks, right? Then you have a laptop with a single hole for ONE jack, so you cannot even plug BOTH jacks from one headset into that single jack.
Second item first. Look at the two jacks on one headset. Each has THREE contacts on it - tip, ring, and sleeve. For an earphone pair, these provide Left, Right, and Ground connections. For a microphone, they provide Mic (mono, not stereo usually), (unused), and Ground. What you do not see directly is what is inside the hole on your laptop. It is designed for a slightly different jack that has FOUR contacts - tip, ring1, ring2, and sleeve. These provide Left and Right earphone, Mic, and Ground.
So you need two types of adapter. One can be used to combine the two headsets in parallel into one pair of jacks - one like this, and you need TWO of these.
https://www.newegg.com/Product/Product.aspx?Item=N82E16812104103&cm_re=headphone_splitter-_-12-104-103-_-Product
Use one to combine the EARPHONE jacks from both headsets into one jack. Then use the other to combine the MIC jacks from the two headsets together.
Now you need ONE of a different adapter like this
https://www.newegg.com/Product/Product.aspx?Item=N82E16812200956&cm_re=headphone_splitter-_-12-200-956-_-Product
Note that this one specifies that it converts the female 4-contact socket hole in your laptop into TWO female (hole) 3-contact sockets - one for the earphone connection, and one for the mic connection. You would plug the other two combiner-adapters into these two output legs. This latter unit does not appear to have any clear label on it for which output arm is for which connection, but it may be marked when you actually get it. Or, you may have to experiment.