Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
thuong quang » thong quang, truong quang, phuong quang
thieu sang » chieu sang, thieu khang, thieu quang
quang dung » quang trung, ung dung, cuong dung
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
thoai cac » tai cac, thong cac, tho cac
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - thanh thuong quang dung cong thanh ((than cao) or (thoai cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh thuong quang dung cong thanh ((than cao) OR (thoai cac)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh thuong quang dung cong thanh ((than cao) or (thoai cac))*.