Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham lan chu snippets" » "pham luan chu snippets", "pham van chu snippets", "phan lan chu snippets", "pham lang chu snippets", "pham lam chu snippets", "pham lan thu 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 lan chu 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 lan chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham lan chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham lan chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.