Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuoc » nam thuc, nam thu, nha thuoc
thanh lay » thanh lap, thanh tay, thanh lam
dua tren » dung tren
thuoc va » thuc va, thuoc ma, thuong va
va thanh » gia thanh, ban thanh, va tinh
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua thep
vu sach » vu bach, su sach, vu khach
ve nam » he nam, va nam, le nam
nang o » nang co, nang ho, nang ro
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. hieu ve nam thuoc va thanh lay ((((cua tre) OR (dua tren))) OR (cua triet))~.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang o hoi. hieu ve nam thuoc va thanh lay ((((cua tre) or (dua tren))) or (cua triet))*.