Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dung cong
hieu van » hieu va, thien van, lieu va
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 (((chieu sang) or (hieu van)))) - hanh tranh cua cong cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (((chieu sang) OR (hieu van)))) - hanh tranh cua cong cong tan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (((chieu sang) or (hieu van)))) - hanh tranh cua cong cong tan than cau*.