Perhaps you should try some spelling variations:
chieu khong » chien chong, chu khong, chieu duong
thieu sang » chieu sang, thieu khang, thieu quang
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
nhung dung » phuong dung, ung dung, thong dung
cua nhung » va nhung
tung cua » trung cua, tuong cua, dung cua
dung anh » dung danh, duong anh, dong anh
tuan cu » tuan tu, quan cua, tuan thu

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) or (chieu khong))) or (hieu quang)) - thanh tung cua nhung dung anh tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu sang) OR (chieu khong))) OR (hieu quang)) - thanh tung cua nhung dung anh tuan cu.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu sang) or (chieu khong))) or (hieu quang)) - thanh tung cua nhung dung anh tuan cu*.