Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
thien nang » thien bang, thien dang, trien nang
hanh mang » nhanh mang, hanh trang, nhanh lang
dang cong » dung cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
mang cua » manh cua, dung cua, ban cua
cua dang » cua cong, cua ban
toan ban » van ban

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 (thien nang)) - hanh mang cua dang cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien chanh) OR (thien nang)) - hanh mang cua dang cong manh toan ban*.