Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"trinh cac quan snippets" » "trinh cau quan snippets", "trinh chat quan snippets", "trinh chao quan snippets", "trinh tac quan snippets", "trinh cac qua snippets", "trinh cao quan 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 ("trinh cac quan snippets"))) or ("locating bug core snippets"))~.
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