Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
thuc cay » thuc day, thuc can, thuc cao
cay xanh » cay lanh, cao anh, day manh
xanh dai » vanh dai, xanh di, xanh tai
su sach » so sach, vu sach
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
va nhan » van nhan, ca nhan, va phan
sach v » sach va, sach y, sach 2
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v ((nang ma) or (tang ma)) hoi. lieu va nhan thuc cay xanh dai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v ((nang ma) OR (tang ma)) hoi. lieu va nhan thuc cay xanh dai cua su.
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang ma) or (tang ma)) hoi. lieu va nhan thuc cay xanh dai cua su*.