Perhaps you should try some spelling variations:
thien tinh » khien tinh, thien minh, tien tinh
hanh trang » thanh trung, canh tranh, hanh trinh
hien tinh » khien tinh, bien tinh, dien tinh
trang cua » tranh cua, tang cua, trung cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien tinh) OR (thien tinh)) - hanh trang cua dung cong ((xuan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tinh) OR (thien tinh)) - hanh trang cua dung cong ((xuan toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tinh) OR (thien tinh)) - hanh trang cua dung cong ((xuan toan) or (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tinh) OR (thien tinh)) - hanh trang cua dung cong ((xuan toan) or (dan than)) cau*.