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