Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vai cac don snippets" » "va cac don snippets", "tai cac don snippets", "voi cac don snippets", "vai cac dan snippets", "vai cac mon snippets", "vai cac doanh 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: (((("vai cac 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: (((("vai cac don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vai cac don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vai cac don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.