Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham ma hon snippets" » "pham va hon snippets", "pham van hon snippets", "pham tai hon snippets", "pham ma hoa snippets", "pham ca hon snippets", "pham manh hon 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 ma hon 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 ma hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham ma hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham ma hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.