Perhaps you should try some spelling variations:
"chon truong cac snippets" » "hoc truong cac snippets", "cao truong cac snippets", "con trung cac snippets", "chon truong cao snippets", "chon trong cac snippets", "chon truong ca snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("chon truong cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
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