Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den pham ca snippets" » "den kham ca snippets", "dien phan ca snippets", "dien phap ca snippets", "den pham can snippets", "den pham ma snippets", "den pham va 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: (((("den pham ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den pham ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den pham ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den pham ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.