Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lap khoa du snippets" » "lao khoa du snippets", "la khoa du snippets", "luan khoa du snippets", "lap khoa dr snippets", "lap hoa du snippets", "lap khoa de 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: (((("lap khoa du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lap khoa du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lap khoa du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lap khoa du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.