Perhaps you should try some spelling variations:
"trinh than duc snippets" » "trinh thanh duc snippets", "trinh han duc snippets", "trinh toan duc snippets", "trinh tran duc snippets", "trinh phan duc snippets", "trinh than doc snippets", "trinh than duc slippers"
"dung trong code snippets" » "dung trong cong snippets", "dung trong co snippets", "dung trong che snippets", "dung trong 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 than duc snippets") or ("dung trong code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh than duc snippets") OR ("dung trong code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh than duc snippets ) or ( dung trong code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh than duc snippets") or ("dung trong code snippets"))) or ("locating bug code snippets"))*.