Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao tich he snippets" » "co tich he snippets", "ca tich he snippets", "cao tinh he snippets", "cao tich ho snippets", "cao trinh he snippets", "cao tich hop 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: (((("cao tich he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao tich he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao tich he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao tich he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.