Perhaps you should try some spelling variations:
"using cfd core snippets" » "using 3d core snippets", "using c core snippets", "using cfd code snippets"
"dung hung code snippets" » "dung chung code snippets", "dung nhung code snippets", "dung huong 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using cfd core snippets\") OR (\"dung hung code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using cfd core snippets ) OR ( dung hung code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using cfd core snippets") OR ("dung hung code snippets"))) OR ("locating bug code snippets"))*.