Perhaps you should try some spelling variations:
"huong tran trinh snippets" » "huong dan trinh snippets", "quang tran trinh snippets", "chuong trinh trinh snippets", "huong trang trinh snippets", "huong tra trinh snippets", "huong thanh trinh snippets", "huong tran 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: (((("huong tran 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: (((("huong tran trinh snippets") OR ("dung cfd code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( huong tran trinh snippets ) or ( dung cfd code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("huong tran trinh snippets") or ("dung cfd code snippets"))) or ("locating bug code snippets"))*.