Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"phan khoa java slippers" » "pham khoa java slippers", "nhan khoa java slippers", "phan hoa java slippers", "phan khoa java slippery", "phan khoa 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: (((("phan khoa 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: (((("phan khoa java slippers") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan khoa java slippers ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan khoa java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.