Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong dinh » phuong binh, phuong linh, phuong trinh
doi chieu » doi chi, ho chieu, mot chieu
trung cua » truong cua, trung tuan, trung cap
dinh toan » tinh toan, hinh toan, minh toan
doc hieu » toc thieu, hoc thieu, hoc hien
tang cua » mang cua, hang cua, tang luan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) sach - hanh ((trung cua) OR (tang cua)) nhung phuong dinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) sach - hanh ((trung cua) or (tang cua)) nhung phuong dinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) sach - hanh ((trung cua) or (tang cua)) nhung phuong dinh toan cau*.