Bulk import from Microsoft Academic search by searching on title. Grab the latest release here, drop it into your translators directory, and import a CSV file that has at least one column called title. The importer will search these titles on MAS, and will add the first hit it gets for each as a new item in Zotero.

If you see less items then you expect, enable Debug Output Logging from the Help menu and look for lines with BulkMAS. At this time I cannot provide feedback on errors until https://groups.google.com/forum/#!topic/zotero-dev/G9RGcnFkPyc is resolved.

Set the hidden preference extensions.zotero.translators.bulkmas.key to your Microsoft Academic Knowledge API key