Perhaps you should try some spelling variations:
"using cfd code snippets" » "using 3d code snippets", "using c code snippets", "using cfd core snippets", "using cfd code slippers"
"dung cac tranh snippets" » "dung cac thanh snippets", "dung can tranh snippets", "dung canh tranh snippets", "luong cac tranh snippets", "dung cho tranh snippets", "dung tai tranh snippets", "dung cac tranh slippers"
"locating bug code snippets" » "locating bug core 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using cfd code snippets") or ("dung cac tranh snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using cfd code snippets") OR ("dung cac tranh snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using cfd code snippets ) or ( dung cac tranh snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using cfd code snippets") or ("dung cac tranh snippets"))) or ("locating bug code snippets"))*.