Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua cua doan snippets" » "qua cua doanh snippets", "qua cua dan snippets", "qua cua toan snippets", "quan cua doan snippets", "quang cua doan snippets", "qua quan doan 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: (((("qua cua doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qua cua doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua cua doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua cua doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.