Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tham thuc » nham thuc, pham thuc, tam thuc
dan doanh » van doanh, san doanh, ban doanh
thuc dan » thuc hanh, hoc dan, thuc vat
vang cua » mang cua, hang cua, tang cua
sach ky » sac ky, sach y, sach ty
va tham » van tham, va cham, va thanh
van cua » ban cua, dan cua, nan cua
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: thuoc sach ky nang x hoi. lieu va tham thuc dan doanh ((van cua) OR (vang cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang x hoi. lieu va tham thuc dan doanh ((van cua) OR (vang cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang x hoi. lieu va tham thuc dan doanh ((van cua) OR (vang cua)) tre*.