Perhaps you should try some spelling variations:
"cong doi trinh snippets" » "cong doc trinh snippets", "cong doi tinh snippets", "cong dong trinh snippets", "vong doi trinh snippets", "cong dot trinh snippets", "cong goi trinh snippets", "cong doi trinh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: "((((\"cong doi trinh snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( cong doi trinh snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("cong doi trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.