Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"dung trung ho snippets" » "dung trong ho snippets", "quang trung ho snippets", "truong trung ho snippets", "dung trung hoc snippets", "dung trung hoa snippets", "dung trung ha snippets"
"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 trung ho snippets"))) or ("locating bug code snippets"))~.
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