Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, nhung don
hoc chieu » hoc thieu, ho chieu, hoc hien
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh ve
quan cau » quang cao, toan cau, quan ha
tuan cu » tuan tu, quan cua, tuan thu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh trinh va ((nhung cong) OR (hang cong)) danh ((quan cau) OR (tuan cu))~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh trinh va ((nhung cong) or (hang cong)) danh ((quan cau) or (tuan cu))*.