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