Perhaps you should try some spelling variations:
"hanh chinh cac snippets" » "hanh chinh ca snippets", "hanh chinh can snippets", "hanh chinh cau snippets", "thanh chinh cac snippets", "anh chinh cac snippets", "hinh chinh cac snippets"
"dung java java snippets" » "dung va java 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: (((("hanh chinh cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh chinh cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh chinh cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh chinh cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.