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