Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc thuan da snippets" » "duc tan da snippets", "duc thang da snippets", "duc phan da snippets", "duc thuat dam snippets", "duc chuan dao snippets", "duc thuan cam 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 thuan da 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 thuan da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc thuan da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc thuan da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.