Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
phuc van » thuc van, phuc va, chuc van
nang xa » nang x, lang xa, nang ma
xanh di » danh di, vanh dai, xanh tai
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
anh di » danh di, anh d, anh du

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

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