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, dau tren, ca tren
sach ky » sac ky, sach kem, sach hay
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
va xanh » va hanh, va danh, va anh
xanh di » danh di, vanh dai, xanh tai
di cau » da cau, diem cau

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