Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
thu nang » thi nang, thu hang, thu bang
van dinh » van minh, van dich, va dinh
cho hoc » khoa hoc
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
dinh vi » dinh ve, dinh viet, dinh thi
vi cua » vai cua, di cua

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) OR (thuoc sach)) thu nang ((cho hoc) or (co hoc)). hieu va cac xuc van dinh vi cua cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) thu nang ((cho hoc) OR (co hoc)). hieu va cac xuc van dinh vi cua cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) thu nang ((cho hoc) or (co hoc)). hieu va cac xuc van dinh vi cua cac*".