Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, mot chieu
tuong cua » truong cua, huong cua, thong cua
tong hang » song hang, thong hoang, tiong chang
cua tong » cua cong, cua dong, cua nong
toan tap » toan ban
va toan » van toan, bai toan, tap toan

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 tuong cua tong hang va toan tap~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh tuong cua tong hang va toan tap*.