Perhaps you should try some spelling variations:
sach duoc » sach nuoc, sach dao, sach dung
vien sach » vien bach, dien sach, viet sach
lieu vien » lieu dien, lieu viet, dieu kien
xanh doi » thanh doi, tinh doi, anh doc
cau tren » cu tren, dau tren, ca tren
so sach » so sanh, bo sach, co sach
duoc va » nuoc va, duc va, duoc ma
xanh di » danh di, vanh dai, xanh tai
su sach » vu sach
y nang » ky nang, ly nang, v nang
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: ((su sach) OR (so sach)) y nang x hoi. lieu vien sach duoc va ((xanh doi) OR (xanh di)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) y nang x hoi. lieu vien sach duoc va ((xanh doi) or (xanh di)) cau tren~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) y nang x hoi. lieu vien sach duoc va ((xanh doi) or (xanh di)) cau tren*.