Perhaps you should try some spelling variations:
sach tao » sach dao, sach bao, sach tai
tao nang » cao nang, tao bang, tai nang
nang cau » nang cao, hang cau, nang dau
co sach » bo sach, cuon sach, hoc sach
cua tre » cua te, cua triet, dua tren
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
va cham » va chat, va tham
cuu tre » cau tren, cau treo
va cam » va cac, va cao, va cai
anh va » hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach tao nang cau hoi. hieu ((va cam) OR (va cham)) xuc van anh va ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach tao nang cau hoi. hieu ((va cam) OR (va cham)) xuc van anh va ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach tao nang cau hoi. hieu ((va cam) OR (va cham)) xuc van anh va ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: co sach tao nang cau hoi. hieu ((va cam) OR (va cham)) xuc van anh va ((cua tre) or (cuu tre))*.