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