Perhaps you should try some spelling variations:
thanh chuong » thanh huong, thanh cong, nhanh chong
chuong quan » cuong quan, phuong quang, thuong quang
thieu sang » thieu khang, thieu quang, hieu lang
chieu sang » chieu sach, chieu xanh, hieu lang
quan nhung » qua nhung, cua nhung, luan chung
cong thang » cong thanh, cang thang, cong thong
cong tan » cong tac, cong san, cong thanh

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)) - thanh chuong quan nhung ((cong tan) or (cong thang)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu sang)) - thanh chuong quan nhung ((cong tan) OR (cong thang)) van ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (chieu sang)) - thanh chuong quan nhung ((cong tan) or (cong thang)) van ban*".