The search only supports complete strings. Wildcards and partial searches do not retrieve any results. For example, to search for SKU ID sku_1f39d18f-2b5a-4a72-b347-f7ec850f5f71, you must entersku_1f39d18f-2b5a-4a72-b347-f7ec850f5f71
, not just sku_1f39d18f
.