Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, hieu lang
nhung dung » phuong dung, ung dung, thong dung
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
dung anh » dung danh, duong anh, dong anh
tuan tu » tuan thu, tran tu, toan tu

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