Perhaps you should try some spelling variations:
"co duoc lieu snippets" » "co du lieu snippets", "tao duoc lieu snippets", "hoa duoc lieu snippets", "hoc duoc lieu snippets", "co duoc lieu slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("co duoc lieu snippets") OR ("python using a snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( co duoc lieu snippets ) or ( python using a snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("co duoc lieu snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.