Perhaps you should try some spelling variations:
cuu tre » cua tre, cau tren, cau treo
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
di cuu » di cau, di cua, dinh cuu
cac tu » cac thu, cach tu, cac du
ve cac » va cac, vien cac
vu sac » vu sach, vu san, vu cac
va sac » va cac, va suc, va san
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sac) OR (va sac)) ky nang ((o hoi) or (co hoi)). hieu ve cac tu va hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sac) OR (va sac)) ky nang ((o hoi) OR (co hoi)). hieu ve cac tu va hanh di cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sac) OR (va sac)) ky nang ((o hoi) or (co hoi)). hieu ve cac tu va hanh di cuu tre*".