Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
ba benh » bo benh, bach benh, tai benh
va benh » tai benh, gay benh, cac benh
day cuu » day cua, day chu, day cuon
cuu tre » cua tre, cau tren, cau treo

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: ((thu sach) OR (tu sach)) ky nang xa hoi. hieu van cam xuc ((ba benh) OR (va benh)) day cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) ky nang xa hoi. hieu van cam xuc ((ba benh) OR (va benh)) day cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang xa hoi. hieu van cam xuc ((ba benh) OR (va benh)) day cuu tre*.