Perhaps you should try some spelling variations:
nien sach » kien sach, nen sach, ngan sach
dien sach » dien anh
xanh doi » xanh di, thanh doi, tinh doi
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va xanh » va danh, va hanh, va anh
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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