Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"cuu hoan xac snippets" » "luu hoang xac snippets", "cuu van xac snippets", "cuu khoa xac snippets", "cuu toan xac snippets", "cuu hoan lac snippets", "cuu hoa xa snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("cuu hoan xac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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