Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham anh den snippets" » "pham thanh den snippets", "pham minh den snippets", "pham van den snippets", "pham danh dien snippets", "pham anh dong snippets", "pham anh dung 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 anh den 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 anh den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham anh den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham anh den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.