Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pha du mot snippets" » "pham duc mot snippets", "pham duy mot snippets", "phan duc mot snippets", "pha dau mot snippets", "pha de mot snippets", "pha dung mot 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: (((("pha du mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pha du mot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pha du mot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pha du mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.