Perhaps you should try some spelling variations:
nghiep nganh » nghiep thanh, nghiep ninh, nghiep anh
hieu nganh » vien nganh, hiem ngan
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, dieu hanh, hien hanh
trinh va » trinh van, trinh vat, trinh ve
cong sat » cong suat, cong san, cong hat
sat nhan » hat nhan, sat phan, ca nhan
nhan cau » nhanh cau, phan cau, nhan sau

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) OR (nghiep nganh)))) - canh trinh va nhung cong sat nhan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (((hieu nganh) OR (nghiep nganh)))) - canh trinh va nhung cong sat nhan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (((hieu nganh) OR (nghiep nganh)))) - canh trinh va nhung cong sat nhan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (((hieu nganh) OR (nghiep nganh)))) - canh trinh va nhung cong sat nhan cau*.