Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nuoc sach de snippets" » "nguoi sach de snippets", "hoc sach de snippets", "cuoc cach de snippets", "nuoc cach de snippets", "nuoc sach dao snippets", "nuoc sach dat 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: (((("nuoc sach 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: (((("nuoc sach de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nuoc sach de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nuoc sach de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.