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