Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mat tich so snippets" » "mach tich so snippets", "xuat tich so snippets", "mat sach so snippets", "mat tich bao snippets", "mat tinh son 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: (((("mat tich so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mat tich so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mat tich so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mat tich so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.