Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tang son snippets" » "duc thang son snippets", "duc tan son snippets", "tuc tang son snippets", "duc trang son snippets", "duc lang son snippets", "duc bang son 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: (((("duc tang son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc tang son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tang son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tang son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.