Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"dung doi tao slippers" » "huong doi tao slippers", "dung tai tao slippers", "dung co tao slippers", "dung doi tac slippers", "dung doi tai slippers", "dung doi tan slippers", "dung doi tao slippery", "dung doi tao 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 ("dung doi tao slippers"))) or ("locating bug code snippets"))~.
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