Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van tham hoi snippets" » "van tham code snippets", "van thanh hoi snippets", "van tuan hoi snippets", "van chat hoi snippets", "van tham hoa snippets", "van cham hoi snippets", "van pham hoai 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: (((("van tham hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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