Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
danh gia » dan gian
kho tang » cao tang
gia cua » gian cua, giau cua, gia cuc
ta danh » tac danh, tao danh, tap danh
cac toc » cac toi, cac nuoc, cac thoi
hieu va » lieu va, hieu qua
toc ta » toc tay, toc thai
cua te » cua tu

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) OR (kho tang)) xa hoi. hieu va cac toc ta danh gia cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((ky nang) or (kho tang)) xa hoi. hieu va cac toc ta danh gia cua te~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ((ky nang) or (kho tang)) xa hoi. hieu va cac toc ta danh gia cua te*.