Perhaps you should try some spelling variations:
nhung phong » nhung phuong, nhung chong, nung phong
dieu sach » dien sach, chieu sach, dieu hanh
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
phong van » phung van, thong van, phong va
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap
he dieu » hoc dieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: he dieu sach - ((canh manh) or (lanh manh)) cua nhung phong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he dieu sach - ((canh manh) OR (lanh manh)) cua nhung phong van toan cau*.