Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hiem ngan » kim ngan, viem gan
canh tinh » hanh tinh, manh tinh, canh tranh
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 ((dieu hanh) or (hiem ngan)) - canh tinh va nhung cong sat nhan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (hiem ngan)) - canh tinh va nhung cong sat nhan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (hiem ngan)) - canh tinh va nhung cong sat nhan cau*.