Use the plus sign (+) to search for multiple keywords. For example, the query +CICS +0C4 returns documents with the words CICS and 0C4 anywhere in the document.
The query CICS 0C4 returns documents with the word CICS or the word 0C4 anywhere in the document.
For text strings that you want to match exactly, enclose the query in quotes, for example, "PLEX PROGRAM".