Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"toan dan cac snippets" » "toan dan code snippets", "toan ban cac snippets", "toan dam cac snippets", "toan dai cac snippets", "toan dan cach snippets", "toan dang cac snippets", "toan dan ca 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: (((("toan dan cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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