Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
tuong cong » truong cong, trong cong, tong cong
trinh toan » tinh toan, thanh toan, trinh quan
doi chieu » doc hieu, doi chi, ho chieu
trung ban » trong ban, trung van, trung can
ban tuong » ban huong, ban trong, va tuong
trinh han » trinh quan

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 ban tuong cong ((trinh toan) or (trinh han)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung ban tuong cong ((trinh toan) OR (trinh han)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung ban tuong cong ((trinh toan) or (trinh han)) cau*.