Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi cong cay snippets" » "thi cong cay snippets", "phan cong cay snippets", "pham cong cay snippets", "phi cong xay snippets", "phi cong cau snippets", "phi cong cac 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: (((("phi cong cay snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi cong cay snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi cong cay snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi cong cay snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.