Perhaps you should try some spelling variations:
"dung theo trinh snippets" » "dung tho trinh snippets", "dung tien trinh snippets", "dung tao trinh snippets", "sung theo trinh snippets", "vung theo trinh snippets", "luong theo trinh snippets", "dung theo trinh slippers"
"dung cfd code snippets" » "dung cho code snippets", "dung cua code snippets", "dung co code snippets", "dung cfd code slippers", "dung cfd core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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