Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
thieu sang » thieu khang, thieu quang, hieu lang
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
nhung cong » dung cong, thong cong, hang cong
tuong cua » truong cua, huong cua, thong cua
cua nhung » va nhung
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, 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) or (((chieu sang) OR (chieu sach)))) - thanh tuong cua nhung cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (((chieu sang) OR (chieu sach)))) - thanh tuong cua nhung cong san than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (((chieu sang) OR (chieu sach)))) - thanh tuong cua nhung cong san than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (((chieu sang) OR (chieu sach)))) - thanh tuong cua nhung cong san than cau*.