Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
tuong va » truong va, thuong va, luong va
cong tan » cong thanh, cong ty, cong ha
cong tac » cong ty
toan tap » toan ban

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 tuong va nhung ((((cong tan) or (cong san))) or (cong tac)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh tuong va nhung ((((cong tan) OR (cong san))) OR (cong tac)) toan tap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh tuong va nhung ((((cong tan) or (cong san))) or (cong tac)) toan tap*.