Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc cong can snippets" » "duc cuong can snippets", "dung cong can snippets", "nuoc cong can snippets", "duc cong san snippets", "duc cong tan snippets", "duc 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: (((("duc cong can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc cong can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc cong can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc cong can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.