Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"when van do snippets" » "when can do snippets", "thien van do snippets", "phan van do snippets", "when van dao snippets", "when van de snippets", "when van du 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: (((("when van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("when van do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( when van do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("when van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.