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