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