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