Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dung cua rong snippets" » "dung luan rong snippets", "dung cho rong snippets", "dung cua cong snippets", "dung cua dong snippets", "dung cua song 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: (((("dung cua rong snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cua rong snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cua rong snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cua rong snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.