Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"duc toi lua slippers" » "duc loi lua slippers", "duc ton lua slippers", "duc thi lua slippers", "duc toi la slippers", "duc hoi luan slippers", "duc thi luan slippers", "duc toi lua slippery", "duc toi lua grippers"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java code snippets") or ("duc toi lua slippers"))) or ("locating bug code snippets"))~.
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