Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
cong tac » cong ty
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 ((thien danh) or (chieu sang)) - hanh tang cua nhung ((cong san) OR (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (chieu sang)) - hanh tang cua nhung ((cong san) OR (cong tac)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) or (chieu sang)) - hanh tang cua nhung ((cong san) OR (cong tac)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (chieu sang)) - hanh tang cua nhung ((cong san) OR (cong tac)) toan cau*.