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 being provided corresponding one of rows of the TCAM cells and coupled to each of TCAM cells of the corresponding row; search lines, each being provided corresponding one of columns of the TCAM cells; a search driver unit supplying input search data through the search lines in a search operation; a match amplifier unit outputting a plurality of search results each indicative of a match or a mismatch for an associated one of the 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 data written to all the TCAM cells of an associated sub-array have a don't care value is activated, the control logic unit of the associated sub-array controls the corresponding search driver unit and the corresponding match amplifier unit of the associated sub-array not to operate based on the control signal, and the corresponding match amplifier unit of the associated sub-array outputs the search results each indicative of the match for the associated one of the match lines according to the control signal.