Perhaps you should try some spelling variations:
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You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced introduction to java programming\") OR (\"advanced python python computer programmers\"))~".
• Removing quotes may allow a broader search: (( advanced introduction to java programming ) OR ( advanced python python computer programmers ))~.
• Adding a wildcard symbol may retrieve word variants: (("advanced introduction to java programming") OR ("advanced python python computer programmers"))*.