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