Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"khoa can ca snippets" » "khoa can code snippets", "khoa cam ca snippets", "khoa cap ca snippets", "khoi can ca snippets", "khoa can cau snippets", "khoa dan ca snippets", "khoa tan 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: (((("khoa can ca snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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