Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chu luan hoc snippets" » "cu luan hoc snippets", "chu xuan hoc snippets", "chu tuan hoc snippets", "chu luan hoan snippets", "chu quang hoc snippets", "chu luan khoa 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: (((("chu luan 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: (((("chu luan hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chu luan hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chu luan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.