Perhaps you should try some spelling variations:
"dong dan trinh snippets" » "dong dan tinh snippets", "dong van trinh snippets", "dong hanh trinh snippets", "dong danh trinh snippets", "duong dan trinh snippets", "dong san trinh snippets", "dong dan 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: "((((\"dong dan trinh snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dong dan trinh snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dong dan trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.