Perhaps you should try some spelling variations:
khong thong » thong thong, khong trong, thong thuong
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
cua khong » hua khong, cua phuong, cua thuong
ban thanh » ban hanh, ban hang
van thanh » van tuan
tung cua » trung cua, tuong cua, dung cua
dan than » dan chan, ban than, van than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - thanh tung cua khong thong ((((dan than) OR (ban thanh))) OR (van thanh)) cau~.
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thanh tung cua khong thong ((((dan than) or (ban thanh))) or (van thanh)) cau*.