Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mach phan du snippets" » "cach pha du snippets", "dich phan du snippets", "sach phat du snippets", "mach phan dau snippets", "mach phan duc snippets", "mach phan dua 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 phan du 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 phan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mach phan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mach phan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.