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