Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam phap hoc snippets" » "nam phan hoc snippets", "pham phap hoc snippets", "nham phat hoc snippets", "nam phap hoan snippets", "nam phap mo snippets", "nam 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: (((("nam 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: (((("nam phap hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam phap hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam phap hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.