Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong vien da snippets" » "dong vien code snippets", "duong vien da snippets", "dong dien da snippets", "dong tien da snippets", "dong vien dai snippets", "dong hien dai snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dong vien da snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong vien da snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dong vien da snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.