Perhaps you should try some spelling variations:
ban hanh » ban hang
sach tao » sach dao, sach bao, sach tai
tao nano » tao nganh, cao nang, tao cao
nano cau » nang cau, bang cau, nano va
dua tren » dung tren
cua tre » cua te, cua triet, cua thep
su sach » so sach, vu sach
xuc ban » duc ban, cuc ban, quoc ban
hieu ve » hieu va, hieu van
cuu tre » cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 ve cam xuc ban hanh vi ((((cua tre) or (dua tren))) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tao nano cau hoi. hieu ve cam xuc ban hanh vi ((((cua tre) OR (dua tren))) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach tao nano cau hoi. hieu ve cam xuc ban hanh vi ((((cua tre) or (dua tren))) or (cuu tre))*.