Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu cai data slippers" » "ngu cai dat slippers", "ngu a data slippers", "ngu aid data slippers", "ngu ca data slippers", "ngu cac data slippers", "ngu cau data slippers", "ngu cai data slippery", "ngu cai data 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: (((("ngu cai data slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngu cai data slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu cai data slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu cai data slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.