Perhaps you should try some spelling variations:
"dung dieu code snippets" » "duong dieu code snippets", "dang dieu code snippets", "dung hieu code snippets", "dung dieu che snippets", "dung dieu co snippets", "dung dieu con snippets"
"hang java java snippets" » "hang va java snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung dieu code snippets") or ("hang java java snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dieu code snippets") OR ("hang java java snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( dung dieu code snippets ) or ( hang java java snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dieu code snippets") or ("hang java java snippets"))) or ("locating bug code slippers"))*.