Perhaps you should try some spelling variations:
"trinh chuc danh snippets" » "trinh thuc danh snippets", "trinh chu danh snippets", "trinh phuc danh snippets", "trinh chuc nganh snippets", "trinh thuc hanh snippets", "trinh chuc nang snippets", "trinh chuc danh 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: (((("trinh chuc danh snippets") or ("dung cfd code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh chuc danh snippets") OR ("dung cfd code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh chuc danh snippets ) or ( dung cfd code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh chuc danh snippets") or ("dung cfd code snippets"))) or ("locating bug code snippets"))*.