Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
cua viet » hoa viet, cua vat, cua dieu
thu sach » tu sach, thuat sach, thuoc sach
thuc va » thuc vat, thuc dan, thuc day
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
va nhan » van nhan, ca nhan, va phan
ca viet » va viet, co viet, hoa viet
x hoi » xa hoi, o hoi, x ho

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) or (thu sach)) ky nang x hoi. lieu va nhan thuc va hanh di ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky nang x hoi. lieu va nhan thuc va hanh di ((cua viet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky nang x hoi. lieu va nhan thuc va hanh di ((cua viet) or (ca viet))*.