Perhaps you should try some spelling variations:
toc cach » hoc cach, toc sach, truoc cach
van hanh » van thanh, ban hanh, van anh
cua cau » cua cac, cua chu, cua can
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
tu ngan » tu ngay, te ngan, tai ngan
cua cay » cua cac
ve cac » va cac, vien cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc cach ((tu ngan) OR (vu ngan)) cho hoc. hieu ve cac xuc van hanh vi ((cua cau) OR (cua cay))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc cach ((tu ngan) OR (vu ngan)) cho hoc. hieu ve cac xuc van hanh vi ((cua cau) or (cua cay))~".
• Adding a wildcard symbol may retrieve word variants: toc cach ((tu ngan) OR (vu ngan)) cho hoc. hieu ve cac xuc van hanh vi ((cua cau) or (cua cay))*.