Perhaps you should try some spelling variations:
"cong luan trinh slippers" » "cong xuan trinh slippers", "cong luan tinh slippers", "cong luan tranh slippers", "tong luan trinh slippers", "cong tuan trinh slippers", "dong luan trinh slippers", "cong luan trinh slippery", "cong luan 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: (((("cong luan 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: (((("cong luan trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong luan trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong luan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.