Perhaps you should try some spelling variations:
nhung phuong » nhu phuong, truong phuong, bang phuong
dung phuong » dung thuong, bang phuong, dung chung
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
hanh dung » thanh dung, anh dung, hanh dong
dung cua » dung luan, dung cho
phan cau » phan dau, phan cac, phan lap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - hanh dung cua ((nhung phuong) or (dung phuong)) doan ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh dung cua ((nhung phuong) OR (dung phuong)) doan ((phan cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh dung cua ((nhung phuong) or (dung phuong)) doan ((phan cau) or (phan tu))*.