Perhaps you should try some spelling variations:
"dong luong khoa snippets" » "dong dung khoa snippets", "cong luong khoa snippets", "dong duong khoa snippets", "dong huong khoa snippets", "dong luong khoa slippers"
"hanh java java snippets" » "hanh va java snippets", "hanh java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hanh java java snippets") or ("dong luong khoa snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh java java snippets") OR ("dong luong khoa snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh java java snippets ) or ( dong luong khoa snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh java java snippets") or ("dong luong khoa snippets"))) or ("locating bug code snippets"))*.