Perhaps you should try some spelling variations:
"huong tran chat snippets" » "huong tran code snippets", "huong dan chat snippets", "quang tran chat snippets", "chuong trinh chat snippets", "huong tran chau snippets", "huong tra chat snippets", "huong tran nhat snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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: (((("huong tran chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("huong tran chat snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( huong tran chat snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("huong tran chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.