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