Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
benh dai » benh tai, benh noi, binh dan
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
cao xuc » cao duc, cao suc, chat xuc
dai cuu » dai cua, dai huu
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky ((nang xa) or (nang x)) hoi. hieu va ((cao xuc) OR (cam xuc)) tai benh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (nang x)) hoi. hieu va ((cao xuc) OR (cam xuc)) tai benh dai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((nang xa) or (nang x)) hoi. hieu va ((cao xuc) OR (cam xuc)) tai benh dai cuu tre*".