Perhaps you should try some spelling variations:
vien sach » vien bach, dien sach, viet sach
lieu vien » lieu dien, lieu viet, dieu kien
sach nuoc » sach duoc, cac nuoc, bach tuoc
cau tren » cu tren, ca tren, cau treo
dau tren » dau tien, dat tren, dau tieng
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
xanh da » xanh ca, xanh di, lanh dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang xa hoi. lieu vien sach nuoc va ((xanh da) OR (xanh a)) ((cau tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. lieu vien sach nuoc va ((xanh da) OR (xanh a)) ((cau tren) OR (dau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. lieu vien sach nuoc va ((xanh da) OR (xanh a)) ((cau tren) or (dau tren))".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. lieu vien sach nuoc va ((xanh da) OR (xanh a)) ((cau tren) or (dau tren))*.