one problem: register A is not initiallized during the first pass through the print loop meaning it could start anywhere depending upon the accumulator contents when the call is made to search_table:

;-----
search_table:
MOV R7,A 'PUSH ACC
MOV DPTR,#table 'point DPTR @ table
loop: '
'you must initialize or clear a before this opcode. omitted first time through
MOVC A,@A+DPTR 'get a character
JZ exit 'jump if acc 0 to exit
LCALL WRITE_TEXT 'write it to the port
INC DPTR 'get next char
CLR A 'clear acc for next character (if the 1st char didn't terminate this will restore for substequent characters
SJMP loop 'loop back to get a character
'exit of acc = 00
exit: 'POP ACC
MOV A,R7 'pop back the value of the acc
RET
;-----