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