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