Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong tinh » phuong trinh, phuong binh, khuong tinh
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
manh cua » doanh cua, ban cua
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 - lanh manh cua nhung phuong tinh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - lanh manh cua nhung phuong tinh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - lanh manh cua nhung phuong tinh ((toan cau) or (toan ban))*.