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