Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc da cau snippets" » "duc dai cau snippets", "duc dao cau snippets", "duc dam cau snippets", "duc dat cau snippets", "duc va cau 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 da cau 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 da cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc da cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc da cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.