Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java code slippers", "using java core snippets"
"danh viet java snippets" » "anh viet java snippets", "ninh viet java snippets", "nang viet java snippets", "danh viet va snippets", "danh viet java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets", "locating bung code snippets", "locating bugs code 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 snippets") or ("using java code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh viet java snippets") OR ("using java code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh viet java snippets ) or ( using java code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh viet java snippets") or ("using java code snippets"))) or ("locating bug code snippets"))*.