Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan nam non snippets" » "van nam non snippets", "dong nam non snippets", "dinh nam non snippets", "dan nam noi snippets", "dan mam non snippets", "dan nam hon 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: (((("dan nam non snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan nam non snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan nam non snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan nam non snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.