Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"duc hanh java slippers" » "duc hanh va slippers", "duc thanh java slippers", "duc anh java slippers", "du hanh java slippers", "duc hanh java slippery", "duc hanh 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: (((("duc hanh 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: (((("duc hanh java slippers") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hanh java slippers ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hanh java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.