Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dung tay » dung tai, dung may, vung tay
anh dai » vanh dai, anh bai, anh dat
ban anh » ban hanh, ban banh, ban danh
cam duc » cao duc, pham duc, nam duoc
hieu ve » hieu va, hieu van
dan tay » ban tay, dao tay, gian tay
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y ((dung tay) or (dan tay)) hoi. hieu ve ((cam duc) OR (cam xuc)) ban anh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((dung tay) OR (dan tay)) hoi. hieu ve ((cam duc) OR (cam xuc)) ban anh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((dung tay) or (dan tay)) hoi. hieu ve ((cam duc) OR (cam xuc)) ban anh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y ((dung tay) or (dan tay)) hoi. hieu ve ((cam duc) OR (cam xuc)) ban anh dai cua tre*.