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