37. A text search method set forth in claim 32, characterized in that in said filtering, a value indicating "ON" is set as a flag for concatenate character codes, referred to as leading concatenate character codes, of a leading portion of the search term designed previously with a value indicating "OFF" being set as a flag to other character codes, referred to as trailing concatenate character codes, then said leading concatenate character codes in those included in said search term, while a value indicating "ON" is set as a flag to the other concatenate character codes, and that said leading concatenate character flag and said trailing concatenate character flag are referenced in correspondence to n concatenate character codes inputted sequentially to thereby output concatenate character codes to said character string matching only when the relevant leading concatenate character flag as read out is "ON" and selectively output n input concatenate character codes to said character string matching only when either the relevant leading concatenate character flag or designated concatenate character flag is "ON" before both of said leading concatenate character flag and said trailing concatenate character flag become "OFF", when said leading concatenate character flag is once assumed "ON".
32. A text search method for deciding en bloc whether or not a plurality of user-designated search terms exist in a text composed of characters expressed in the form of character codes, characterized in that character codes are sequentially fetched from said text to thereby make a decision as to whether or not n, where n represents an integer not smaller than 2, character codes as fetched are included in said search terms as a concatenate character string and output by extracting said n concatenate character codes, referred to as concatenate filtering, only when they are included in said search terms, and that matching is performed en bloc for deciding whether or not said search terms exist in a compound character string constituted by a chain of character strings each composed of the n concatenate character codes as outputted, and synchronizing between said filtering step and said matching step for buffering differences in processing speed while transferring data from said filtering step to said matching step.