Perhaps you should try some spelling variations:
"dung quang cau snippets" » "dang quang cau snippets", "luong quang cau snippets", "dung luan cau snippets", "dung quang cao snippets", "dung quang cu snippets", "dung quan cau snippets"
"using cfd code snippets" » "using 3d code snippets", "using c code snippets", "using cfd core snippets"
"locating bug code snippets" » "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: (((("using cfd code snippets") or ("dung quang cau 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 quang cau snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using cfd code snippets ) or ( dung quang cau snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using cfd code snippets") or ("dung quang cau snippets"))) or ("locating bug code snippets"))*.