Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau cua con snippets" » "dai cua con snippets", "day cua con snippets", "cau cua con snippets", "dau cua cong snippets", "dau cua co snippets", "dau cua can 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: (((("dau cua con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dau cua con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau cua con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau cua con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.