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