Perhaps you should try some spelling variations:
"hanh thuoc cach snippets" » "thanh phuoc cach snippets", "hanh phuc cach snippets", "dang thuoc cach snippets", "hanh thuoc sach snippets", "hanh thuc cach snippets", "hanh truoc cach 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 thuoc cach 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 thuoc cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh thuoc cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh thuoc cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.