Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh de » hanh ve, hanh kem
hanh te » hanh tu, hanh ve, hanh he
cua tuc » cua duc, cua tu, cua thuoc
ke cau » ket cau
y nang » ky nang, ly nang, v nang
loc va » hoc va, luc va
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang x hoi. hieu ((ve cac) OR (ke cau)) loc va ((hanh te) OR (hanh de)) cua tuc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang x hoi. hieu ((ve cac) or (ke cau)) loc va ((hanh te) OR (hanh de)) cua tuc~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang x hoi. hieu ((ve cac) or (ke cau)) loc va ((hanh te) OR (hanh de)) cua tuc*.