Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghe moi can snippets" » "nghe noi can snippets", "nghe nuoi can snippets", "nghe hoa can snippets", "nghe voi can snippets", "nghe loi can snippets", "nghe moi ban 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: (((("nghe moi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nghe moi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghe moi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghe moi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.