Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan huu voi snippets" » "pham huu voi snippets", "phan huy voi snippets", "phan hieu voi snippets", "phan cuu voi snippets", "phan hue voi snippets", "phan huu hoi 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: (((("phan huu voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan huu voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan huu voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan huu voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.