Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"giam do cac snippets" » "giam doc cac snippets", "gia do cac snippets", "giac do cac snippets", "giam o cac snippets", "giam co cac snippets", "giam do cao 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: (((("giam do cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("giam do cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( giam do cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("giam do cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.