Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thuc day » thuc dan, thuc vat
sach ky » sac ky, sach y, sach ty
nang ha » nang hai, nang han, nang hoa
dan vai » dan tai, dan vat, den vai
cuu tre » cua tre, cau tren, cau treo
ha hoi » hoa hoi, ha noi, xa hoi
va nam » van nam, ha nam
va nay » va ngay, va cay
dan va » doan va, dan ca, ban va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ha hoi. hieu ((va nam) OR (va nay)) thuc day ((dan vai) OR (dan va)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ha hoi. hieu ((va nam) or (va nay)) thuc day ((dan vai) OR (dan va)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ha hoi. hieu ((va nam) or (va nay)) thuc day ((dan vai) OR (dan va)) cuu tre*.