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