Perhaps you should try some spelling variations:
"tri hoc chat snippets" » "tri hoc code snippets", "tri hoc phat snippets", "tri hoc cao snippets", "tri hoc phan snippets", "triet hoc chat snippets", "tri thuc chat snippets", "thai hoc chat snippets"
"locating bug core snippets" » "locating bug code 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: (((("python using java snippets") or ("tri hoc chat snippets"))) or ("locating bug core snippets"))~.
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