Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tung can cau snippets" » "tung can code snippets", "trung can cau snippets", "tung dan cau snippets", "trung cap cau snippets", "tung van cau snippets", "tung ban cau snippets", "tung ca cau 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: (((("tung can cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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