Perhaps you should try some spelling variations:
"dung duong duc snippets" » "dung dong duc snippets", "dong duong duc snippets", "dung dung duc snippets", "dung luong duc snippets", "dung duong qua snippets", "dung dang duc snippets", "dung duong duc 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 duong duc 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 duong duc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang java java snippets ) or ( dung duong duc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang java java snippets") or ("dung duong duc snippets"))) or ("locating bug code snippets"))*.