Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"duoc dan cau snippets" » "duoc dan code snippets", "duc dan cau snippets", "duoc ban cau snippets", "duoc dai cau snippets", "duoc danh cau snippets", "duoc dan ca snippets", "duoc dat cau 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: (((("duoc dan cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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