Perhaps you should try some spelling variations:
su sach » vu sach
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
cam thu » nam thu, cac thu, ca thu
thu day » thuc day, thu da, thu dac
hanh di » hanh de, hang di, danh di
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam

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 (so sach)) y nang x ho. hieu ve cam thu day ((hanh di) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang x ho. hieu ve cam thu day ((hanh di) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang x ho. hieu ve cam thu day ((hanh di) or (hanh vi)) cua tre*.