Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tra danh hoc snippets" » "tra danh code snippets", "tran danh hoc snippets", "trai doanh hoc snippets", "tran manh hoc snippets", "tra dan hoc snippets", "tra danh hoa snippets", "tra anh hoc 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: (((("tra danh hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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