Perhaps you should try some spelling variations:
thuoc gia » thuoc giao, quoc gia, thuoc ma
lam thuoc » nam thuoc, am thuc, cay thuoc
thanh hai » thanh phan, thanh hoa
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
van lam » van nam
cua cau » cua cac, cua chu, cua cay
nang o » nang co, nang ho, nang ro
cua tu » cua tuc, cua su, cua cu
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. hieu van lam thuoc gia ((thanh hai) or (thanh san)) ((cua tu) or (cua cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang o hoi. hieu van lam thuoc gia ((thanh hai) OR (thanh san)) ((cua tu) OR (cua cau)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang o hoi. hieu van lam thuoc gia ((thanh hai) or (thanh san)) ((cua tu) or (cua cau))*.