Perhaps you should try some spelling variations:
"dan trinh xuat slippers" » "dan trinh luat slippers", "dan trinh xuan slippers", "dan trinh xay slippers", "dan tinh xuat slippers", "van trinh xuat slippers", "hanh trinh xuat slippers", "dan trinh xuat slippery", "dan trinh xuat grippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 java java snippets") or ("dan trinh xuat slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dan trinh xuat slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dan trinh xuat slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dan trinh xuat slippers"))) or ("locating bug code snippets"))*.