Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dung khai thuc snippets" » "dung hai thuc snippets", "dang khai thuc snippets", "dung khi thuc snippets", "dung khai thac snippets", "dung thai thuc snippets", "dung khau thuoc snippets"
"locating bug core snippets" » "locating bug 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 khai thuc snippets"))) or ("locating bug core snippets"))~.
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