Perhaps you should try some spelling variations:
quang nhung » quang hung, quan nhung, quang phuong
nhung cong » dung cong, thong cong, hang cong
trinh phan » trinh han, trinh quan, thanh phan
hieu manh » chieu xanh, hieu nganh, hien hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
phan cau » phan dau, phan cac, phan tu

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 manh) or (dieu hanh)) - hanh tinh quang nhung cong trinh phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (dieu hanh)) - hanh tinh quang nhung cong trinh phan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (dieu hanh)) - hanh tinh quang nhung cong trinh phan cau*.