Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"may van duy snippets" » "may san duy snippets", "may va duy snippets", "ma van duy snippets", "may van dung snippets", "may van duy slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("may van duy snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("may van duy snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( may van duy snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("may van duy snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.