Perhaps you should try some spelling variations:
"doc trinh code snippets" » "doc trinh cong snippets", "doc trinh co snippets", "doc trinh cad snippets", "doc tinh code snippets", "doi trinh code snippets", "hoc trinh code snippets", "doc trinh code 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"

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: (((("doc trinh code snippets") OR ("python using a snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( doc trinh code snippets ) or ( python using a snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("doc trinh code snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.