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