Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban sach hon snippets" » "ban sac hon snippets", "ban mach hon snippets", "ngan sach hon snippets", "ban sach han snippets", "ban sach hoi snippets", "ban tach hon 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: (((("ban sach hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban sach hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban sach hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban sach hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.