Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
su sach » so sach, vu sach
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
va xanh » va danh, va hanh, va anh
xanh di » danh di, vanh dai, xanh tai
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
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.

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