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