Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
trong van » trong cac
tinh cua » trinh cua, sinh cua, tinh chat
tang van » dang van, hoang van, tang luan

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 manh) or (chieu xanh)) - hanh tinh cua nhung cong ((tang van) OR (trong van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - hanh tinh cua nhung cong ((tang van) OR (trong van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu xanh)) - hanh tinh cua nhung cong ((tang van) OR (trong van)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - hanh tinh cua nhung cong ((tang van) OR (trong van)) ban*.