A device controlling program causes, when executed, a processor to perform: receiving input of an input word; searching function information stored in a memory and obtaining a first search result relating to the input word, the first search result being included in the function information, the function information including at least one of a function of the device controlling program and a function of the device; in response to obtaining no first search result relating to the input word as a result of the search process, determining a search word including the input word and a related word identifying at least one of the device controlling program and the device, and transmitting a search request to the server for a second search result, the search request including the search word; and in response to receiving the second search result from the server, displaying the second search result on a display.