Perhaps you should try some spelling variations:
lam thuc » lam thuoc, am thuc, nam thuc
van hanh » van thanh, ban hanh, van ban
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
cuu tre » cua tre, cau tren, cau treo
va lam » van lam, va lap
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang xa hoi. hieu va lam thuc ((van hanh) or (van anh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu va lam thuc ((van hanh) OR (van anh)) di cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu va lam thuc ((van hanh) or (van anh)) di cuu tre*.