Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran doi cua snippets" » "truan doi cua snippets", "trao doi cua snippets", "tren doi cua snippets", "tran hoi cua snippets", "tran dai cua snippets", "tran dong cua snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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