Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao vien phi slippers" » "dao viet phi slippers", "dan vien phi slippers", "dao tien phi slippers", "dao vien nhi slippers", "dao vien phu slippers", "dao viem phoi slippers", "dao vien phi slippery", "dao vien phi grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dao vien phi slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao vien phi slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao vien phi slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao vien phi slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.