Perhaps you should try some spelling variations:
"dan trinh khoi slippers" » "dan trinh hoi slippers", "dan trinh khoa slippers", "dan trinh khai slippers", "dan tinh khoi slippers", "van trinh khoi slippers", "hanh trinh khoi slippers", "dan trinh khoi slippery", "dan trinh khoi 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 khoi 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 khoi slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dan trinh khoi slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dan trinh khoi slippers"))) or ("locating bug code snippets"))*.