Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
vu sach » vu bach, su sach, vu khach
hanh ve » hanh vi, hanh va, hanh kem
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
co sach » bo sach, cuon sach, hoc sach
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (((so sanh) or (co sach)))) ky lang xa hoi. lieu va cau thuc va hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (((so sanh) OR (co sach)))) ky lang xa hoi. lieu va cau thuc va hanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (((so sanh) or (co sach)))) ky lang xa hoi. lieu va cau thuc va hanh ve cua tre*.