Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet pha du snippets" » "viet phan du snippets", "viet phap du snippets", "viet ha du snippets", "viet pham duc snippets", "viet pham duy snippets", "viet phan duc 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: (((("viet pha 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: (((("viet pha du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet pha du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet pha du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.