Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc dan di snippets" » "duc dan di snippets", "duoc ban di snippets", "duoc dai di snippets", "duoc danh di snippets", "duoc dan da snippets", "duoc dan 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: (((("duoc dan di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc dan di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc dan di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc dan di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.