Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc luan de snippets" » "duoc luan de snippets", "luc luan de snippets", "du luan de snippets", "duc luan den snippets", "duc luan ve snippets", "duc luat de 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 luan de 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 luan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc luan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc luan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.