Perhaps you should try some spelling variations:
"trong toc code snippets" » "trong tuc code snippets", "trong hoc code snippets", "trong tac code snippets", "trong toc co snippets", "trong toc cong snippets", "trong toc ede 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.

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