Perhaps you should try some spelling variations:
"duong java java snippets" » "duong va java snippets"
"dang dung code snippets" » "dan dung code snippets", "dang hung code snippets", "dang quang code snippets", "dang dung cong snippets", "dang dung co snippets", "dang dung de snippets"
"locating bug core snippets" » "locating bug code snippets"

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 dung code snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"duong java java snippets\") OR (\"dang dung code snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( duong java java snippets ) OR ( dang dung code snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong java java snippets") OR ("dang dung code snippets"))) OR ("locating bug core snippets"))*.