Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thien dang » thien bang, thien danh, thien nang
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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 (thien dang)) - hanh trung cua nhung cong ((tan toan) OR (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien dang)) - hanh trung cua nhung cong ((tan toan) OR (tap toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien dang)) - hanh trung cua nhung cong ((tan toan) OR (tap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien dang)) - hanh trung cua nhung cong ((tan toan) OR (tap toan)) cau*.