Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"chu cac nhan snippets" » "chu ca nhan snippets", "chu cac nha snippets", "chu cam nhan snippets", "cho cac nhan snippets", "cuu cac nhan snippets", "chu cai nhan snippets"

Try widening your search to All Fields.

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