Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, pham thuc
nham thu » nam thu, pham thu, nhan thuc
sach dao » lanh dao
su sach » so sach, vu sach
xanh di » danh di, vanh dai, xanh tai
xa xanh » xa thanh, cay xanh, mau xanh
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
di cua » dai cua, doi cua, de cua
cua su » qua su

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: su sach dao ((nang ma) OR (sang ma)) hoi. lieu va ((nham thuc) OR (nham thu)) xa xanh di cua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach dao ((nang ma) or (sang ma)) hoi. lieu va ((nham thuc) OR (nham thu)) xa xanh di cua su~".
• Adding a wildcard symbol may retrieve word variants: su sach dao ((nang ma) or (sang ma)) hoi. lieu va ((nham thuc) OR (nham thu)) xa xanh di cua su*.