Perhaps you should try some spelling variations:
giay thanh » gia thanh, gian thanh
thanh hoi » thanh hoai, thanh hoa, thanh hai
hieu van » hieu va, thien van, lieu va
toc giay » toc tay, tac gia, hoc giao
vu sach » vu bach, su sach, vu khach
lam toc » lam thuoc, lam truoc, lam duoc
van lam » van nam
cua tuc » cua duc, cua thuoc, luat tuc
sach ky » sac ky, sach y, sach ty
so hoc » co hoc, mo hoc, so hoa
cua tu » cua su, cua cu, cua te
o hoi » co hoi, o hoc, o hai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ((o hoi) OR (so hoc)). hieu van lam toc giay thanh hoi ((cua tu) OR (cua tuc))~.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ((o hoi) or (so hoc)). hieu van lam toc giay thanh hoi ((cua tu) or (cua tuc))*.