Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham la du snippets" » "pham lan du snippets", "pham lao du snippets", "pham ma du snippets", "pham lap du snippets", "pham la duy snippets", "pham ly 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: (((("pham la 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: (((("pham la du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham la du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham la du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.