1. A mobile terminal comprising: a touchscreen; a memory; and a controller configured to: cause the memory to store a handwritten character received via the touchscreen as an image, the image tagged to a confirmed text character; search in a text database for a page of a file including the stored image that matches a search term received via the touchscreen as a handwritten character, wherein the searched page has at least two handwritten characters including the matched stored handwritten character; and cause the touchscreen to display the searched page, sizes of the at least two handwritten characters included in the displayed searched page having been adjusted to a same preset size.
2. The mobile terminal of claim 1 , wherein the controller is further configured to: recognize the handwritten character in real-time; cause the touchscreen to display one or more candidate text characters that correspond to the recognized handwritten character; cause the memory to store one of the one or more candidate text characters as the confirmed text character; and link the confirmed text character to the handwritten character.