Perhaps you should try some spelling variations:
thanh trung » thanh tung
trong manh » trong minh, trong anh, trong mach
thien anh » thien danh, thien thanh, thien chanh
manh toan » thanh toan, anh tuan, tinh toan
tien anh » tieng anh, tien manh, dien anh
tam dung » tam duong, tac dung, tan dung
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 anh) or (tien anh)) - thanh trung tam dung trong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (tien anh)) - thanh trung tam dung trong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (tien anh)) - thanh trung tam dung trong manh toan cau*.