Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
lam thuoc » nam thuoc, am thuc, cay thuoc
lam thuc » am thuc, nam thuc, dam thuc
dinh cuu » dinh chi
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky lang) or (ky tang)) xa hoi. hieu va ((lam thuc) OR (lam thuoc)) va hanh dinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky tang)) xa hoi. hieu va ((lam thuc) OR (lam thuoc)) va hanh dinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky tang)) xa hoi. hieu va ((lam thuc) OR (lam thuoc)) va hanh dinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky tang)) xa hoi. hieu va ((lam thuc) OR (lam thuoc)) va hanh dinh cuu tre*.