Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hanh tranh » hanh trinh, hanh trang, lanh tranh
hieu manh » chieu xanh, dieu hanh, hien hanh
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan tap » toan tap, han tap, tan tat

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 manh) or (hieu nganh)) - ((hanh tranh) or (canh tranh)) cua dong cong van tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - ((hanh tranh) OR (canh tranh)) cua dong cong van tan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (hieu nganh)) - ((hanh tranh) or (canh tranh)) cua dong cong van tan tap*.