Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van dai hoi snippets" » "van dai code snippets", "vanh dai hoi snippets", "van dao hoi snippets", "van hai hoi snippets", "van dai hoc snippets", "van dai hai snippets", "van dai moi 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: (((("python using java snippets") or ("van dai hoi snippets"))) or ("locating bug core snippets"))~.
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