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