Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
ky cau » ky chau, ke cau
luc va » tuc va, loc va
di cua » dai cua, doi cua, de cua
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: te sach ky nang ((co hoi) or (o hoi)). hieu ky cau ((luc va) OR (duc va)) danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((co hoi) OR (o hoi)). hieu ky cau ((luc va) OR (duc va)) danh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((co hoi) or (o hoi)). hieu ky cau ((luc va) OR (duc va)) danh di cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((co hoi) or (o hoi)). hieu ky cau ((luc va) OR (duc va)) danh di cua tre*.