Perhaps you should try some spelling variations:
lap thuoc » lam thuoc, phap thuoc, cay thuoc
dinh hai » dinh thai, tinh hai, dinh ha
thuoc va » thuc va, thuoc ma, thuong va
su sach » vu sach
cua tre » cuu tre, cua triet, dua tren
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
va dinh » van dinh, va kinh, va tinh
va lap » va dap
nang o » nang co, nang ho, nang ro
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang o hoi. hieu va lap thuoc va dinh hai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang o hoi. hieu va lap thuoc va dinh hai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang o hoi. hieu va lap thuoc va dinh hai ((cua tre) OR (cua te))*.