Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cam truc » cau truc, nam truc, lam truoc
su sach » so sach, vu sach
quan xa » quan ha, quan va, quan cua
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) lien quan xa hoi. hieu va cam truc va hanh vi cua vat~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) lien quan xa hoi. hieu va cam truc va hanh vi cua vat*.