Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tra cuu he snippets" » "tra cuu code snippets", "tra cau he snippets", "trau cua he snippets", "trua cua he snippets", "tra cuu che snippets", "tra cuu ve snippets", "tra cuu de 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 cuu he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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