Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cau treo » cau theo, cau tren, cau triet
tang xa » trang xa, lang xa, tang ha
tang ma » mang may, tang van
sach ky » sac ky, sach y, sach ty
dan vai » dan va, dan tai, den vai
dan vat » dang vat, van vat, dan va
hieu ha » hieu hoa, hieu va, hieu ca
thu va » thuc va, thue va, tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky ((tang xa) or (tang ma)) hoi. hieu ha nam thu va ((dan vai) OR (dan vat)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((tang xa) OR (tang ma)) hoi. hieu ha nam thu va ((dan vai) OR (dan vat)) cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((tang xa) or (tang ma)) hoi. hieu ha nam thu va ((dan vai) OR (dan vat)) cau treo".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((tang xa) or (tang ma)) hoi. hieu ha nam thu va ((dan vai) OR (dan vat)) cau treo*.