Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc ban doc snippets" » "duc tan doc snippets", "duc van doc snippets", "dua ban doc snippets", "duc ban duoc snippets", "duc ban do snippets", "duc bai doc 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 ban doc 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 ban doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc ban doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc ban doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.