Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
chuc danh » chuc nganh, thuc hanh, chuc nang
chua xang » chua nang, chuc nang, chu bang
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, van toan
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chuc danh) or (chua xang)) - thanh trung cua nhung cong ban toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc danh) OR (chua xang)) - thanh trung cua nhung cong ban toan cau*.