Perhaps you should try some spelling variations:
xanh doi » thanh doi, tinh doi, anh doc
xanh di » danh di, vanh dai, xanh tai
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach 2, sach vay
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach v) or (sach y)) nang xa hoi. hieu vu cham soc va ((xanh doi) OR (xanh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach y)) nang xa hoi. hieu vu cham soc va ((xanh doi) OR (xanh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach y)) nang xa hoi. hieu vu cham soc va ((xanh doi) OR (xanh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach y)) nang xa hoi. hieu vu cham soc va ((xanh doi) OR (xanh di)) cua tre*.