Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den nguy ca snippets" » "den ngay ca snippets", "benh nguy ca snippets", "den nguoi ca snippets", "den ngu ca snippets", "den nguy co snippets", "den nguy tao 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 nguy 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 nguy ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den nguy ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den nguy ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.