Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap vat toc snippets" » "phap luat toc snippets", "phap phat toc snippets", "phap viet toc snippets", "phap vat hoc snippets", "phap vat duoc snippets", "phap vat quoc 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: (((("phap vat toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap vat toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap vat toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap vat toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.