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

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 nano cau hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh va ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach tao nano cau hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh va ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach tao nano cau hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh va ((cua tre) or (cuu tre))*".