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