Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dat hoc dung snippets" » "dat hoc ung snippets", "dat hoc dan snippets", "dat hoc cong snippets", "dai hoc dung snippets", "vat hoc dung snippets", "dan hoc dung snippets"

Try widening your search to All Fields.

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