Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
cham thuc » nham thuc, pham thuc, tham thuc
danh kien » dinh kien, danh viet, linh kien
doc sach » hoc sach, toc sach, dac sac
thuc dan » thuc hanh, hoc dan, thuc vat
dan danh » van danh, han danh, ban danh
kien cua » khien cua, dien cua, tien cua
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cua te » cua tu
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: ((doc sach) OR (nuoc sach)) ky nang x hoi. hieu va cham thuc dan danh kien cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (nuoc sach)) ky nang x hoi. hieu va cham thuc dan danh kien cua te".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) OR (nuoc sach)) ky nang x hoi. hieu va cham thuc dan danh kien cua te*.