Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
xuc ngan » luc ngan, luc nganh, vu ngan
cham xuc » cam xuc, chat xuc, cham soc
ve cham » va cham, ve chat, vu cham
sach tu » sach thu, cach tu, sach ty
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
tu cong » thu cong, te cong, tai cong
co hai » co dai, co hoi, so hai
va cau » van cau, va cac, va dau
o hai » so hai, o lai, _ hai

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: tu sach tu cong ((o hai) OR (co hai)). hieu ve cham xuc ngan (hang OR bang) va cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu cong ((o hai) or (co hai)). hieu ve cham xuc ngan (hang OR bang) va cau tren~".
• Adding a wildcard symbol may retrieve word variants: tu sach tu cong ((o hai) or (co hai)). hieu ve cham xuc ngan (hang OR bang) va cau tren*.