Perhaps you should try some spelling variations:
"trinh cad code slippers" » "trinh cau code slippers", "trinh cac code slippers", "trinh cam code slippers", "trinh cfd code slippers", "trinh cad model slippers"
"luong va code snippets" » "dung va 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: (((("luong va code snippets") OR ("trinh cad code slippers"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( luong va code snippets ) or ( trinh cad code slippers ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("luong va code snippets") or ("trinh cad code slippers"))) or ("locating bug code snippets"))*.