1. A data search system, comprising: a processor; and a TCAM (Ternary Content Addressable Memory) including a plurality of sub-arrays, wherein each of the sub-arrays comprises: TCAM cells arranged in rows and columns; match lines each provided in a row of the TCAM cells and coupled to each of TCAM cells of the corresponding row; search lines each provided in a column of the TCAM cells; a search driver unit supplying inputted search data through the search lines in a search operation; a match amplifier unit outputting a search result indicative of a match or a mismatch for each match lines in the search operation; a control logic circuit controlling the search driver unit and the match amplifier unit based on a command received from the processor; a register generating a control signal based on a register setup data received from the processor, wherein, when the control signal indicating that all the TCAM cells of the one sub-array have a don't care value is activated, the control logic unit controls the search driver unit and the match amplifier unit not to operate and the match amplifier unit outputs the search result indicative of the match for each match lines.