Perhaps you should try some spelling variations:
dien sach » dien anh
sach nuoc » sach duoc, cac nuoc, bach tuoc
xanh doi » thanh doi, tinh doi, anh doc
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
xanh di » danh di, vanh dai, xanh tai

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 nang xa hoi. lieu dien sach nuoc va ((xanh doi) OR (xanh di)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. lieu dien sach nuoc va ((xanh doi) OR (xanh di)) cau tren".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. lieu dien sach nuoc va ((xanh doi) OR (xanh di)) cau tren*.