Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh van
so sach » so sanh, bo sach, co sach
tuc ban » thuc ban, truc ban, tu ban
van hai » van ha, van chat, van hanh
sach ky » sac ky, sach y, sach ty
van hac » van hoc, van ha, van chat
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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 nang ma hoi. hieu ((van hac) OR (van hai)) tuc ban ((hanh vai) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang ma hoi. hieu ((van hac) OR (van hai)) tuc ban ((hanh vai) OR (hanh vi)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang ma hoi. hieu ((van hac) OR (van hai)) tuc ban ((hanh vai) or (hanh vi)) cua tre*".