Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong khan va slippers" » "cong khanh va slippers", "cong nhan va slippers", "cong phan va slippers", "cong khoan va slippers", "cong han va slippers", "cong khan va slippery", "cong khan va grippers"
"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: (((("cong khan va slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong khan va slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong khan va slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong khan va slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.