Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu ve » hieu va, hieu van
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » tang ma, sang ma, nang cao
luy tre » luyen tre
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
vi luy » vi lua, vi luu

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: ((te sach) OR (toc sach)) ky ((nang x) OR (nang ma)) hoi. hieu ve cac xuc va dinh vi luy tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky ((nang x) or (nang ma)) hoi. hieu ve cac xuc va dinh vi luy tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky ((nang x) or (nang ma)) hoi. hieu ve cac xuc va dinh vi luy tre*.