Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach dan mon snippets" » "sach danh mon snippets", "sach dao mon snippets", "sach dat mon snippets", "sach dap mon snippets", "sach dan dong snippets", "sach dong mon 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 dan mon 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 dan mon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach dan mon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach dan mon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.