Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
hiem ngan » kim ngan, viem gan
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
bang cong » dang cong, bang song, hang cong
tinh cua » trinh cua, sinh cua, tinh chat
dan than » dan chan, ban than, van 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: doc ((hieu xanh) or (hiem ngan)) - hanh tinh cua ((nhung cong) or (bang cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hiem ngan)) - hanh tinh cua ((nhung cong) OR (bang cong)) dan than cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hiem ngan)) - hanh tinh cua ((nhung cong) or (bang cong)) dan than cau*.