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