Perhaps you should try some spelling variations:
"tang nguon java slippers" » "tang nguyen java slippers", "dung nguon java slippers", "bang ngon java slippers", "tang ngu java slippers", "tang nguon java slippery", "tang nguon 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: (((("tang nguon 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: (((("tang nguon java slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang nguon java slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang nguon java slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.