Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cay xanh » cay lanh, cao anh, day manh
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
va nham » va cham, va tham, va nha
xa xanh » xa thanh, mau xanh, rau xanh
tai cua » thai cua, tai cuc, tri cua
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
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 y nang ma hoi. lieu va nham thuc ((xa xanh) OR (cay xanh)) tai cua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. lieu va nham thuc ((xa xanh) OR (cay xanh)) tai cua su".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. lieu va nham thuc ((xa xanh) OR (cay xanh)) tai cua su*.