Perhaps you should try some spelling variations:
"dao doanh duc snippets" » "cao doanh duc snippets", "dao danh duc snippets", "dao thanh duc snippets", "dao doanh duoc snippets", "dao doanh dich snippets", "dao doanh cuoc snippets", "dao doanh duc slippers"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw snippets", "python using sat slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("dao doanh duc snippets") or ("python using sat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao doanh duc snippets") OR ("python using sat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao doanh duc snippets ) or ( python using sat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao doanh duc snippets") or ("python using sat snippets"))) or ("locating bug code snippets"))*.