Perhaps you should try some spelling variations:
sach duoc » sach nuoc, sach dao, sach dung
cham thuc » nham thuc, pham thuc, tham thuc
sach vuc » sach nuoc, sach truc, sach bac
vat hanh » vat thanh, van hanh, va hanh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach vuc) OR (sach duoc)) nang x hoi. hieu ve cham thuc vat hanh di cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach vuc) OR (sach duoc)) nang x hoi. hieu ve cham thuc vat hanh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach vuc) OR (sach duoc)) nang x hoi. hieu ve cham thuc vat hanh di cuu tre*.