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