Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan ma den snippets" » "nhan mac den snippets", "nhan va den snippets", "nhan my den snippets", "nhan ma dien snippets", "nhan man den 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: (((("nhan ma 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: (((("nhan ma den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan ma den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan ma den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.