Perhaps you should try some spelling variations:
"dung cau cong snippets" » "dung chau cong snippets", "dung cu cong snippets", "dung cac cong snippets", "dung cuu cong snippets", "dung cao cong snippets"
"dung cfd code snippets" » "dung cho code snippets", "dung cua code snippets", "dung co code snippets"
"locating bug core snippets" » "locating bug 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: (((("dung cau cong snippets") or ("dung cfd code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cau cong snippets") OR ("dung cfd code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung cau cong snippets ) or ( dung cfd code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cau cong snippets") or ("dung cfd code snippets"))) or ("locating bug core snippets"))*.