Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu cua » hieu qua, dieu cua, bieu cua
cau treo » cau theo, cau triet, cau trieu
nam thuc » nam thuoc, am thuc, nam thu
cau tren » cu tren, dau tren, ca tren
cua nam » cua tam, cua ngan, cua nhan
dang xa » dang xay, lang xa, dang ha
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
dan vai » dan va, dan tai, dan vat
cuu tre » cua tre
ky dang » ky nang, ky danh
va dan » ca dan, va dao, va dau

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 dang xa hoi. hieu cua nam thuc va dan vai ((cuu tre) or (((cau treo) or (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky dang xa hoi. hieu cua nam thuc va dan vai ((cuu tre) OR (((cau treo) OR (cau tren)))).
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky dang xa hoi. hieu cua nam thuc va dan vai ((cuu tre) or (((cau treo) or (cau tren))))*.