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