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