Systems and methods of evaluating search query terms in a computer network environment are provided. A data processing system can obtain, from a computing device via a computer network, a first search query and a second search query, and can determine a relationship between the first search query and the second search query. The data processing system can generate a structured search query representative of the first search query and the second search query, and can select, based on the structured search query, a content item for display by the computing device. The data processing system can receive an indication of a click on the content item, and can provide, to a content publisher computing device, a representation of the structured search query and the indication of the click on the content item.