Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu nganh » vien nganh, hieu manh, nghiep nganh
hiem ngan » kim ngan, viem gan
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu nganh) OR (hiem ngan)) - thanh trung cua dung cong tan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) OR (hiem ngan)) - thanh trung cua dung cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) OR (hiem ngan)) - thanh trung cua dung cong tan than cau*.