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