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