Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong luan cu snippets" » "dong luan code snippets", "dung luan cu snippets", "tong luan cu snippets", "dong xuan cu snippets", "dong tuan cu snippets", "dong luan chi snippets", "dong quan cua snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dong luan cu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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