Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((5 hoi) or (o hoi)). hieu ((van nam) or (van cau)) xuc va hanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((5 hoi) OR (o hoi)). hieu ((van nam) OR (van cau)) xuc va hanh di cua vat.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((5 hoi) or (o hoi)). hieu ((van nam) or (van cau)) xuc va hanh di cua vat*.