Perhaps you should try some spelling variations:
"trinh dao code slippers" » "trinh do code slippers", "trinh da code slippers", "trinh dan code slippers"
"dung cfd code snippets" » "dung cho code snippets", "dung cua code snippets", "dung co code snippets"
"locating bug code snippets" » "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: (((("trinh dao code slippers") OR ("dung cfd code snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( trinh dao code slippers ) or ( dung cfd code snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh dao code slippers") or ("dung cfd code snippets"))) or ("locating bug code snippets"))*.