Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc duy long snippets" » "duc duc long snippets", "duc duy nong snippets", "duc duy dong snippets", "duc huy long snippets", "duc quy long snippets", "duc dung long 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 duy long 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 duy long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc duy long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc duy long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.