Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van khuc cac snippets" » "van khuc code snippets", "van phuc cac snippets", "van thuc cac snippets", "van phuoc cac snippets", "van khuc ca snippets", "van thuc cach 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: (((("van khuc cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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