Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den manh hon snippets" » "den hanh hon snippets", "den thanh hon snippets", "tien manh hon snippets", "den manh ho snippets", "den minh hon snippets", "den manh huong 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 manh hon 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 manh hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den manh hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den manh hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.