Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cau trieu » cac trieu, cau triet, chua trieu
toc sach » hoc sach, doc sach, nuoc sach
thuc cao » thuoc cao, thuc co, thuc can
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
cao dan » cao dang, cao danh, cac dan
dan vai » dan va, dan tai, dan vat
vai cau » va cau, van cau, vai cac
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (thuoc sach)) ky tang xa hoi. hieu va am thuc cao dan vai cau trieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) ky tang xa hoi. hieu va am thuc cao dan vai cau trieu.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuoc sach)) ky tang xa hoi. hieu va am thuc cao dan vai cau trieu*.