Perhaps you should try some spelling variations:
te sach » toc sach
cau luc » cau truc, cau phuc
cua tre » cuu tre, cua triet, dua tren
hieu ke » hieu kem, chieu ke, hieu ky
sach ky » sac ky, sach y, sach ty
dan di » danh di, dan da, dan de
va dan » ca dan, va dao, va dau
ke cau » ket cau
luc va » duc va, tuc va, loc va
ro hoi » co hoi, mo hoi, ro doi
cua te » cua tu
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 ((ro hoi) or (o hoi)). hieu ke cau luc va dan di ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ro hoi) OR (o hoi)). hieu ke cau luc va dan di ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ro hoi) or (o hoi)). hieu ke cau luc va dan di ((cua tre) or (cua te))*.