Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"bang nhung cau snippets" » "bang chung cau snippets", "sang nhung cau snippets", "ban nhung cau snippets", "bang chung cu snippets", "bang nhung bai snippets", "bang nhu cau 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 ("bang nhung cau snippets"))) or ("locating bug core snippets"))~.
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