Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"when van du snippets" » "when can du snippets", "thien van du snippets", "phan van du snippets", "when van duy snippets", "when van dau snippets", "when van de 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 du 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 du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( when van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("when van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.