Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"ton cho trac snippets" » "ton cho rac snippets", "ton pho trach snippets", "ton cho cac snippets", "toan cho trac snippets", "ton kho trac snippets", "trong cho trac snippets"

Try widening your search to All Fields.

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