Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
van lam » van nam
danh xa » danh ca, dinh xa, canh xa
ky danh » ky anh, ky dang
xac va » tac va, ac va, mac va
bac va » ban va, bac ha, bao va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky danh xa hoi. hieu van lam ((((xac va) OR (bac va))) or (tuc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky danh xa hoi. hieu van lam ((((xac va) OR (bac va))) OR (tuc va)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky danh xa hoi. hieu van lam ((((xac va) OR (bac va))) or (tuc va)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky danh xa hoi. hieu van lam ((((xac va) OR (bac va))) or (tuc va)) hanh vai cua tre*.