Graphical user interfaces and method for building Boolean queries and viewing search results using search cells, combination cells, toolbar, and menu bar. Search cells are movable within a workspace and contain a text field, facet type designation, advanced button, and hit count. Categories are chosen using a category walker. Combination cells, a Boolean combination of two or more selected search cells, are also movable and contain a combine icon, hit count, and an expression field. The Boolean query is depicted in a folder tree hierarchy, where search folders are shown within combination folders, which are represented as logical AND, OR, or MINUS folder icons. An applet in a browser accesses a server through the Internet.