Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thanh tung » thanh cong
quan khong » quang khang, quang thong, quan hoang
khong cang » thong cong, hong bang, khong dung
tung quan » tuong quan, trung quan, dung quan
cang san » cong san, cang sau, nang sang
san chan » san chang, dan chan, san chay
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) OR (chieu sach)) - thanh tung quan khong cang san chan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu sach)) - thanh tung quan khong cang san chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu sach)) - thanh tung quan khong cang san chan cau*.