Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cua cau » cua chu, cua cay, cua can
van anh » van thanh, tuan anh, van minh
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 nano » truc nano
tu nang » tru nang, tu nong, tu lang
ve cac » va cac, vien cac
anh vi » hanh vi, anh va, anh ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((tu nang) or (tu nano)) cho hoc. hieu ve cac xuc van anh vi ((cua cau) OR (cua cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tu nang) OR (tu nano)) cho hoc. hieu ve cac xuc van anh vi ((cua cau) OR (cua cac))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((tu nang) or (tu nano)) cho hoc. hieu ve cac xuc van anh vi ((cua cau) OR (cua cac))*".