Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
ve bac » ve bao, ve cac, ve ban
bo van » vo van, so van, do van
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: tu sach ky nang x hoi. hieu ve bac bo van ((hanh di) OR (hanh de)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ve bac bo van ((hanh di) OR (hanh de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ve bac bo van ((hanh di) OR (hanh de)) cua tre*.