Perhaps you should try some spelling variations:
toan thuong » toan thong, ton thuong, than thuong
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
tung toan » dung toan, truong toan, quang toan
ho chieu » theo chieu, hoc thieu, doi chieu
dung von » dong von, dung cong, dung va
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac
dong » cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - thanh tung toan thuong ((dung von) or (dong co)) ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh tung toan thuong ((dung von) OR (dong co)) ((than cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh tung toan thuong ((dung von) or (dong co)) ((than cau) or (than cap))*.