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