Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
chieu sach » chinh sach, chiet tach, chieu sang
hieu cach » hieu cac, hieu ca, biet cach
trinh cua » trinh luat, trinh quan, trinh luan
tuong van » truong van, trong van, duong van
tinh cua » sinh cua, tinh chat, tranh cua
van tan » van tuan, van ban, van tai
tan cau » toan cau, van cau, tan ca

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: hoc ((hieu cach) OR (chieu sach)) - hanh ((trinh cua) OR (tinh cua)) nhung tuong van tan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) or (chieu sach)) - hanh ((trinh cua) OR (tinh cua)) nhung tuong van tan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) or (chieu sach)) - hanh ((trinh cua) OR (tinh cua)) nhung tuong van tan cau*.