Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
manh tuong » manh tung, manh cuong, minh tuong
thong cong » trong cong, tong cong, thong thong
tuong cao » truong cao, luong cao, duong cao
cao thong » cao thuong, tao thong, cao phong
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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 xanh) or (chieu sang)) - manh tuong cao thong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - manh tuong cao thong cong dan van ban*.