Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
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
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan
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 phuong ((van toan) OR (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he dieu sach - ((canh manh) OR (lanh manh)) cua nhung phuong ((van toan) OR (van tuan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "he dieu sach - ((canh manh) or (lanh manh)) cua nhung phuong ((van toan) OR (van tuan)) cau*".