Perhaps you should try some spelling variations:
"dong tranh java snippets" » "dong thanh java snippets", "dong trinh java snippets", "trong tranh java snippets", "dong tranh va snippets"
"trinh do core snippets" » "trinh ky core snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh do core snippets") OR ("dong tranh java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( trinh do core snippets ) or ( dong tranh java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh do core snippets") or ("dong tranh java snippets"))) or ("locating bug code snippets"))*.