Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"mon toan lap snippets" » "manh toan lap snippets", "minh toan lap snippets", "nin toan lap snippets", "mon toan tap snippets", "mon toan lao snippets", "mon tan lap snippets"

Try widening your search to All Fields.

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