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