Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dac san tran snippets" » "dac tan tran snippets", "dac ban tran snippets", "dac dang tran snippets", "dac sac tran snippets", "cac san tran snippets", "dac nhan tran snippets"

Try widening your search to All Fields.

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