Perhaps you should try some spelling variations:
"dung bieu dat snippets" » "dung hieu dat snippets", "dung tieu dat snippets", "hung bien dat snippets", "dung bieu dac snippets", "dung lieu data snippets", "dung lieu dao snippets", "dung bieu dat 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 bieu dat 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 bieu dat snippets") OR ("dung cfd code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung bieu dat snippets ) or ( dung cfd code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung bieu dat snippets") or ("dung cfd code snippets"))) or ("locating bug code snippets"))*.