Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, hieu lang
trinh cuu » trinh cau, trinh cua, trinh chu
nong cong » cong cong, nang cong, dong cong
tong cong » trong cong, cong cong, dung cong
danh toan » manh toan, anh toan, dan toan
tien anh » tieng anh, tien manh, dien anh
toan cau » toan cao, toan ban, toan tap

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 sang) or (tien anh)) - hanh trinh cuu ((nong cong) or (tong cong)) danh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (tien anh)) - hanh trinh cuu ((nong cong) OR (tong cong)) danh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (tien anh)) - hanh trinh cuu ((nong cong) or (tong cong)) danh toan cau*.