Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat moi don snippets" » "nha moi don snippets", "nhat mpsi don snippets", "nhap mon don snippets", "nhat moi doi snippets", "nhat moi con snippets", "nhat moi dan 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: (((("nhat moi don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat moi don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat moi don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat moi don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.