Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
benh dai » benh tai, benh noi, binh dan
benh day » benh cay, benh da, benh nay
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
tu sach » su sach, te sach, tu cach
cuu tre » cua tre, cau tren, cau treo
xuc ba » xuc ban

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 day) OR (benh dai)) 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 day) OR (benh dai)) 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 day) OR (benh dai)) cuu tre*.