Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nham thuc du snippets" » "nhan thuc du snippets", "nam thuc du snippets", "nham thu du snippets", "nham truc du snippets", "nham thuc su snippets", "nham thuc tu 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: (((("nham thuc 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: (((("nham thuc du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nham thuc du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nham thuc du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.