Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"voi luc son snippets" » "noi luc son snippets", "voi suc son snippets", "voi cuoc son snippets", "voi lac son snippets", "voi luc sang snippets", "voi quoc son 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: (((("voi luc son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("voi luc son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( voi luc son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("voi luc son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.