Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"den trinh le snippets" » "den trinh code snippets", "den tinh le snippets", "dan trinh le snippets", "tien trinh le snippets", "den trinh ly snippets", "den trinh he snippets", "den trinh ve 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: (((("den trinh le snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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