Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
cham xuc » cam xuc, chat xuc, cham soc
sach tao » sach dao, sach bao, sach tai
van hanh » van thanh, ban hanh, van anh
nano cau » nang cau, bang cau, nano va
tao nano » tao nganh, cao nang, tao cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xuc van » duc van, luc van, vuc van
hanh va » hang va, hanh vi
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tao nano cau hoi. hieu va cham xuc van hanh va ((cua tre) or (((cuu tre) or (cau treo))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tao nano cau hoi. hieu va cham xuc van hanh va ((cua tre) OR (((cuu tre) OR (cau treo)))).
• Adding a wildcard symbol may retrieve word variants: su sach tao nano cau hoi. hieu va cham xuc van hanh va ((cua tre) or (((cuu tre) or (cau treo))))*.