Use two different find requests when wanting an OR on the same field, such as if via script.
Enter Find Mode [ uncheck pause ]
Set Field [ checkboxfield ; "A B"
Set Field [ checkboxfield ; "E F"
Set Error Capture [ On ]
Perform Find [ ]
If [ not Get ( LastError ) // no errors found ]
Show Custom Dialog [ "No records found" ]
... do whatever you wish with your found records
Note that, in the script, records will be found even if their order in the checkbox doesn't match your script, so A¶B would be found and so would B¶A. Note also that you don't need to specify carriage return between your entries; all are treated as individual words.
Ok~ thank you very much!
I will give it a try!!