1. A computer-implemented method, comprising: receiving user input specifying (i) search criteria for acquiring search results, (ii) a maximum payment amount that may be paid for document content, and (iii) result parameters that indicate how to enrich a document with document content embodying search results; defining a machine readable form of the search criteria and the result parameters for insertion into the document to be enriched; responsive to receipt of the search criteria inserted in the document in the machine readable form, using the search criteria to acquire search results; the acquired search results being associated with a purchase fee; providing document content to enrich the document with document content embodying the search results in accordance with the result parameters when the purchase fee does not exceed the maximum payment amount; wherein at least said receiving, translating, using, and providing are performed using one or more processors.