Perhaps you should try some spelling variations:
"trinh van dat slippers" » "trinh han dat slippers", "trinh quan dat slippers", "trinh toan dat slippers", "trinh van dao slippers", "trinh van dau slippers", "trinh dan dat slippers", "trinh van dat slippery", "trinh van dat 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"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("trinh van dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh van dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh van dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh van dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.