Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong chua de snippets" » "cong cua de snippets", "cong chuc de snippets", "con chua de snippets", "cong chu de snippets", "cong chua xe snippets", "cong chua dien 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: (((("cong chua de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong chua de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong chua de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong chua de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.