Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham huu con snippets" » "pham duc con snippets", "pham duy con snippets", "phan huy con snippets", "pham huu co snippets", "pham huu son snippets", "pham cuu cong 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 huu con 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 huu con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham huu con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham huu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.