Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
tien manh » tien anh, tien thanh, tieng anh
hanh hang » thanh hang, hang hang, hanh han
trong dan » trong dang, trong san, trong tan
cua dong » chua dong, cua cong, cua dang
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
ha dong » hoat dong, van dong

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 chanh) or (tien manh)) - hanh hang ((cua dong) or (ha dong)) trong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien chanh) OR (tien manh)) - hanh hang ((cua dong) OR (ha dong)) trong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien chanh) or (tien manh)) - hanh hang ((cua dong) or (ha dong)) trong dan toan cau*.