Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh trung » thanh tung
thong chong » thong chuong, thong thong, phong chong
thieu sang » chieu sang, thieu quang, hieu lang
chong phap » phuong phap
trung tao » trung tam, trong tao, trung tai
tao thong » tao trong, giao thong, toan thong
phap toan » phap hoan, phap luan, phap phan
toan tap » toan ban

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 khang)) - thanh trung tao thong chong phap toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - thanh trung tao thong chong phap toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu khang)) - thanh trung tao thong chong phap toan tap*.