Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
cuu tre » cua tre, cau tren, cau treo
vai cuu » vai cua
hieu ve » hieu va, hieu van
cac co » cac cong
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi
cac lo » cac lop, cac bo, cac ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang ((ma hoi) or (xa hoi)). hieu ve ((cac lo) or (cac co)) van hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ((ma hoi) OR (xa hoi)). hieu ve ((cac lo) OR (cac co)) van hanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ((ma hoi) or (xa hoi)). hieu ve ((cac lo) or (cac co)) van hanh vai cuu tre*.