Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
tong cong » trong cong, cong cong, dung cong
trinh van » trinh han, trinh quan, trinh toan
tien anh » tieng anh, tien manh, dien anh
manh cua » doanh cua
ban cua » ban quan
van cau » van dau, van hau, van chat

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 ((thieu xanh) OR (tien anh)) - hanh ((manh cua) OR (ban cua)) tong cong trinh van cau~.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (tien anh)) - hanh ((manh cua) or (ban cua)) tong cong trinh van cau*.