Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thuc cao » thuoc cao, thuc co, thuc can
cau treo » cau theo, cau tren, cau triet
lang xa » lang ha, dang xay, lang van
tang xa » trang xa, tang ma, tang ha
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
dan vai » dan va, dan tai, den vai
dan vat » dang vat, van vat, dan va
va am » va lam, va cam

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: toc sach ty ((tang xa) OR (lang xa)) hoi. hieu va am thuc cao ((dan vai) OR (dan vat)) cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty ((tang xa) or (lang xa)) hoi. hieu va am thuc cao ((dan vai) OR (dan vat)) cau treo~".
• Adding a wildcard symbol may retrieve word variants: toc sach ty ((tang xa) or (lang xa)) hoi. hieu va am thuc cao ((dan vai) OR (dan vat)) cau treo*.