Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
vien cac » vien bach, vien dai, vien da
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
cua cau » cua cac, cua chu, cua cay
cho hoc » co hoc, khoa hoc
tu nano » truc nano
tu nang » tru nang, tu nong, tu lang
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
ve cac » va cac

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) OR (vien cac)) xuc van anh vi cua cau~.
• 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) OR (vien cac)) xuc van anh vi cua cau*.
• 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) OR (vien cac)) xuc van anh vi cua cau*".