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