Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van dam doc snippets" » "van nam doc snippets", "van dao doc snippets", "van dau doc snippets", "van dam dac snippets", "van dat doc snippets", "van day doc snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("van dam doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van dam doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van dam doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van dam doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.