You need to look into Import from Another Catalog and also File > Export as Catalog.
Instead of simply copying the rows, select them in Lightroom on the laptop and do File > Export as Catalog, ensuring that negatives are ticked. This creates a folder with a Lightroom catalogue and all the selected raw files.
Copy this folder over to your min computer and do a File > Import from Another catalog. This brings all your raw files and all your work (flags, virtual copies, stacking etc) into the main catalogue.
It's also great when you need to take work on the road and then bring back any changes into the main catalogue.
John