Perhaps you should try some spelling variations:
"quan dong code snippets" » "quang dong code snippets", "quan long code snippets", "quan hoang code snippets", "quan dong co snippets", "quan dong che snippets", "quan dong cong snippets"
"dung java java snippets" » "dung va java 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: (((("quan dong code snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"quan dong code snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug core snippets\"))*".
• Removing quotes may allow a broader search: (((( quan dong code snippets ) OR ( dung java java snippets ))) OR ( locating bug core snippets ))*.