Perhaps you should try some spelling variations:
"dong hieu data slippers" » "dung hieu data slippers", "dong trieu data slippers", "doc hieu data slippers", "dong lieu data slippers", "dong bieu dat slippers", "dong hieu bat slippers", "dong hieu data slippery", "dong hieu 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: (((("dong hieu 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: (((("dong hieu data slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong hieu data slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong hieu data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.