Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach len con snippets" » "sach luyen con snippets", "sach tien con snippets", "sach tren con snippets", "sach len cong snippets", "sach lon con snippets", "sach le con 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: (((("sach len con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach len con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach len con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach len con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.