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