Perhaps you should try some spelling variations:
"trinh cua dat snippets" » "tinh cua dat snippets", "trinh luat dat snippets", "trinh quan dat snippets", "trinh cua dan snippets", "trinh cua vat snippets", "trinh cua dai snippets", "trinh cua dat slippers"
"dung cho code snippets" » "dung cho cong snippets", "dung cfd code snippets", "dung cho con snippets", "dung cho code slippers"
"locating bug code snippets" » "locating bug code slippers", "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 cua dat snippets") or ("dung cho code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cua dat snippets") OR ("dung cho code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh cua dat snippets ) or ( dung cho code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh cua dat snippets") or ("dung cho code snippets"))) or ("locating bug code snippets"))*.