Perhaps you should try some spelling variations:
"nhan hieu data snippets" » "nhan dieu data snippets", "phan hieu data snippets", "nha hieu data snippets", "nhan lieu data snippets", "nhan bieu dat snippets", "nhan hieu bat snippets", "nhan hieu data slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("nhan hieu data snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan hieu data snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan hieu data snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan hieu data snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.