Perhaps you should try some spelling variations:
thanh hoai » thanh hoa, thanh hai, thanh oai
hieu van » hieu va, thien van, lieu va
duoc gia » duoc giao, quoc gia, duc gia
lam duoc » nam duoc, luat duoc, lam thuoc
van lam » van nam
vu sach » vu bach, su sach, vu khach
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.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang ((o hoi) or (so hoc)). hieu van lam duoc gia thanh hoai ((cua tu) or (cua tuc))~.
• 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 duoc gia thanh hoai ((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 duoc gia thanh hoai ((cua tu) or (cua tuc))*.