Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
dong cong » duong cong, dung cong, dang cong
cong tinh » cong trinh, cong vinh, long tinh
mang cua » manh cua, dung cua, cong cua
toan cau » toan cao, toan ban, toan tap
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (chieu xanh)) - hanh ((mang cua) or (ban cua)) dong cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - hanh ((mang cua) OR (ban cua)) dong cong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - hanh ((mang cua) or (ban cua)) dong cong tinh toan cau*.