Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets", "data using java slippers"
"nang viet trac snippets" » "anh viet trac snippets", "nang viet tran snippets", "nang viet trang snippets", "nang viet thuc snippets", "nang viet trac 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: (((("data using java snippets") or ("nang viet trac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("data using java snippets") OR ("nang viet trac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( data using java snippets ) or ( nang viet trac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("data using java snippets") or ("nang viet trac snippets"))) or ("locating bug code snippets"))*.