Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
chieu sang » chieu sach, chieu xanh, hieu lang
duong manh » duong van
doi chieu » doc hieu, doi chi, ho chieu
trung hoc » trung quoc
manh toan » thanh toan, anh tuan, tinh toan
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 - thanh ((trung tam) or (trung hoc)) nhung duong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((trung tam) OR (trung hoc)) nhung duong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((trung tam) or (trung hoc)) nhung duong manh toan cao*.