Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach tich he snippets" » "mach tich he snippets", "sach kinh he snippets", "suc tich he snippets", "sach tich ho snippets", "sach trinh he snippets", "sach 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: (((("sach 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: (((("sach tich he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach tich he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach tich he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.