Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi cong ton snippets" » "thi cong ton snippets", "phan cong ton snippets", "pham cong ton snippets", "phi cong toan snippets", "phi cong tan snippets", "phi cong lon 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 ton 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 ton snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi cong ton snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi cong ton snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.