Perhaps you should try some spelling variations:
chieu khong » chien chong, chu khong, chieu duong
thanh thong » thanh thuong, thanh hong, thanh thang
khong thong » thong thong, khong trong, thong thuong
hieu lang » chieu sang, hieu quang, nhieu tang
thong cua » thong tu, huong cua
cua khong » hua khong, cua phuong, cua thuong
quan quan » quan quang, qua quan, quan luan
quan cu » quan cua, quang cu, quan 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 ((hieu lang) or (chieu khong)) - thanh thong cua khong thong quan quan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (chieu khong)) - thanh thong cua khong thong quan quan cu*.