Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, dai khoa
cac khoi » cac thoi, cac khoan, cach thoi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
han tri » han tai, van tri, thanh tri
su sach » so sach, vu sach
van han » van hanh, van phan, van nhan
xuc van » duc van, luc van, vuc van
su sac » su cac, su xac
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 sac) or (su sach)) ky nang ((mai khoi) or (cac khoi)). hieu ve cam xuc van han tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky nang ((mai khoi) OR (cac khoi)). hieu ve cam xuc van han tri cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su sach)) ky nang ((mai khoi) or (cac khoi)). hieu ve cam xuc van han tri cua tre*.