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