Perhaps you should try some spelling variations:
"duc thanh java slippers" » "duc thanh va slippers", "duc trinh java slippers", "duc think java slippers", "duc thang java slippers", "duc tan java slippers", "de thanh java slippers", "duc thanh java slippery", "duc thanh java grippers"
"hang java java snippets" » "hang va 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 thanh java slippers") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc thanh java slippers") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc thanh java slippers ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc thanh java slippers") or ("hang java java snippets"))) or ("locating bug code snippets"))*.