Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, dieu hanh, hien hanh
canh tinh » hanh tinh, manh tinh, canh tranh
va thong » va thuong, va phuong, he thong
cong sat » cong suat, cong san, cong hat
sat nhan » hat nhan, sat phan, ca nhan
nhan cau » nhanh cau, phan cau, nhan sau
tinh va » tich va, trinh van, trinh vat

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)) - canh tinh va thong cong sat nhan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - canh tinh va thong cong sat nhan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (hieu nganh)) - canh tinh va thong cong sat nhan cau*.