Perhaps you should try some spelling variations:
"dan thanh ca snippets" » "dang thanh ca snippets", "danh thanh ca snippets", "ban thanh ca snippets", "dan thanh cha snippets", "dan thanh cac snippets", "dan thanh ha snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "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: (((("dan thanh ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan thanh ca snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan thanh ca snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan thanh ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.