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