Perhaps you should try some spelling variations:
"dung tran tuan snippets" » "dung tren tuan snippets", "hung tran tuan snippets", "dang tran tuan snippets", "dung tran xuan snippets", "dung tran quang snippets", "dung tran thanh snippets", "dung tran tuan slippers"
"hang java java snippets" » "hang va java snippets", "hang 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: (((("dung tran tuan snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tran tuan snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tran tuan snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tran tuan snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.