Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
hien cac » thien cac, vien cac, hieu cac
cac giai » tac gia, cuu giai, hoc giai
cua tre » cuu tre, cua triet, dua tren
kinh va » kinh van, tinh va, sinh va
va kinh » va tinh, qua kinh
giai va » giai van, gia va, giai ma
tu sach » thu sach, su sach, tu cach
te sach » toc sach
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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: ((tu sach) OR (te sach)) ky nang x hoi. bieu hien cac giai va kinh va ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang x hoi. bieu hien cac giai va kinh va ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang x hoi. bieu hien cac giai va kinh va ((cua tre) or (cua te))*.