. "Any process that activates or increases the frequency, rate or extent of the migration of the endothelial cells of blood vessels." . . . "positive regulation of blood vessel endothelial cell migration" . "activation of blood vessel endothelial cell migration" . "stimulation of blood vessel endothelial cell migration" . "up regulation of blood vessel endothelial cell migration" . "up-regulation of blood vessel endothelial cell migration" . "upregulation of blood vessel endothelial cell migration" . . . .