Perhaps you should try some spelling variations:
"hanh java java snippets" » "hanh va java snippets", "hanh java java slippers"
"dung tien code snippets" » "duong tien code snippets", "dung tren code snippets", "dong tien code snippets", "dung tien cong snippets", "dung tien code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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 ("dung tien code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh java java snippets") OR ("dung tien code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh java java snippets ) or ( dung tien code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh java java snippets") or ("dung tien code snippets"))) or ("locating bug code snippets"))*.