Perhaps you should try some spelling variations:
"duong java java snippets" » "duong va java snippets"
"dang cuong cac snippets" » "dang cong cac snippets", "tang cuong cac snippets", "quang cuong cac snippets", "dang luong cac snippets", "dang trong cac 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: (((("duong java java snippets") or ("dang cuong cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong java java snippets") OR ("dang cuong cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong java java snippets ) or ( dang cuong cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong java java snippets") or ("dang cuong cac snippets"))) or ("locating bug code snippets"))*.