Perhaps you should try some spelling variations:
"dung land trong snippets" » "dung lang trong snippets", "dung lanh trong snippets", "dung anh trong snippets", "dung luan trong snippets", "dung lam trong snippets", "dung san trong snippets", "dung land trong 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: (((("hang java java snippets") or ("dung land trong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang java java snippets") OR ("dung land trong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang java java snippets ) or ( dung land trong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang java java snippets") or ("dung land trong snippets"))) or ("locating bug code snippets"))*.