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