Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets", "data using java slippers"
"cuong tap trac snippets" » "luong tap trac snippets", "cong tac trac snippets", "luong tai trac snippets", "cuong tap toan snippets", "cuong tap 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 ("cuong tap 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 ("cuong tap trac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( data using java snippets ) or ( cuong tap trac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("data using java snippets") or ("cuong tap trac snippets"))) or ("locating bug code snippets"))*.