Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, hieu lang
cong thong » cong thuong, cong trong, dong thong
tuong cua » truong cua, huong cua, thong cua
cong tang » cong thang, cong tan, cong lang
ho chieu » theo chieu, hoc thieu, doi chieu
cua bang » chua bang, cua ban, cua dang

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 cua bang ((cong tang) or (cong thong)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh tuong cua bang ((cong tang) OR (cong thong)) van ban*.