Perhaps you should try some spelling variations:
"dang thanh son snippets" » "dong thanh son snippets", "dang hanh son snippets", "hoang thanh son snippets", "dang thanh san snippets", "dang thanh cong snippets", "dang thanh toan 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: (((("dang thanh son snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang thanh son snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang thanh son snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang thanh son snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.