Perhaps you should try some spelling variations:
cac khoi » cac thoi, cac khoan, cach thoi
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
mai khoi » mai khoa, tai khoa, dai khoa
tai cuu » tai cuc, tai buu, tai cua
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
su sach » so sach, vu sach
ve cam » ve cham, ve cac, va cam
su sac » su cac, su xac

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 hanh tai cuu 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 hanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su sach)) ky nang ((mai khoi) or (cac khoi)). hieu ve cam xuc van hanh tai cuu 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 hanh tai cuu tre*.