Perhaps you should try some spelling variations:
"danh cho cong snippets" » "danh cho code snippets", "danh cao cong snippets", "danh cua cong snippets", "danh cac cong snippets", "doanh cho cong snippets", "dan cho cong snippets", "dinh cho cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("danh cho cong snippets") or ("python using sat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh cho cong snippets") OR ("python using sat snippets"))) OR ("locating bug core snippets")).
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