Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham thuc » nham thuc, pham thuc, tham thuc
doanh van » doan van, doanh va, doanh ban
thuc day » thuc dan, thuc vat
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va cham » va chat, va tham
danh va » doanh va, hanh va, anh va
cua tre » cua te, cuu tre, cua triet
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 ty nang x hoi. lieu va cham thuc day ((danh va) or (doanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty nang x hoi. lieu va cham thuc day ((danh va) OR (doanh van)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty nang x hoi. lieu va cham thuc day ((danh va) or (doanh van)) cua tre*.