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
ke cau » ket cau
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
le cau » le mau, le cap
cua tu » cua tuc, cua su, cua cu
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 ((le cau) OR (ke cau)) luc va ((hanh te) OR (hanh de)) cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang x hoi. hieu ((le cau) or (ke cau)) luc va ((hanh te) OR (hanh de)) cua tu~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang x hoi. hieu ((le cau) or (ke cau)) luc va ((hanh te) OR (hanh de)) cua tu*.