Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
chieu sang » chieu sach, chieu xanh, hieu lang
trinh quan » tinh quang, trinh han
phuong ban » phuong bang, phuong lan, phuong bac
doi chieu » doc hieu, doi chi, ho chieu
ban toan » bai toan, ban than, van toan
toan cau » toan cao, toan ban, toan tap

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