Perhaps you should try some spelling variations:
"dong chen tu snippets" » "dong chan tu snippets", "dong che tu snippets", "dong chuyen tu snippets", "dong chen yu snippets", "dong chon tu snippets", "dong chen tu 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 chen tu 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 chen tu snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong chen tu snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong chen tu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.