You could use a syringe. You can get them at flooring supply stores or pharmacies. What you might try first is just heating-up the edges of the tiles with a blow dryer and then rolling them back into the glue with a hand roller. Weight them over night with something heavy and flat. A framing square and paint buckets works well, or some flat bricks. If this doesn't work, I recommend removing the affected tiles completely and reapplying the adhesive. Most vinyl tiles should only be installed after sufficient open time, so let the glue tack-up some and you shouldn't have the problem with seam contamination. Also make sure you're using the recommended trowel size and adhesive remover. For most vinyl floors a small amount of mineral spirits on a clean rag will easily remove adhesive residue. Never apply it directly to the floor.