Perhaps you should try some spelling variations:
"using java cacore snippets" » "using data cacore snippets", "using java caccore snippets", "using java caocore snippets", "using java caicore snippets"
"dung va ca snippets" » "dung va cac snippets", "dung va cao snippets", "dung va cai snippets"
"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: (((("using java cacore snippets") or ("dung va ca snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java cacore snippets") OR ("dung va ca snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java cacore snippets ) or ( dung va ca snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java cacore snippets") or ("dung va ca snippets"))) or ("locating bug code snippets"))*.