Perhaps you should try some spelling variations:
"mang viet data slippers" » "nang viet data slippers", "anh viet data slippers", "mai viet data slippers", "mang viet dat slippers", "mang viet ta slippers", "mang lieu data slippers", "mang viet data slippery", "mang viet data 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: (((("mang viet data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mang viet data slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mang viet data slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mang viet data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.