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