Perhaps you should try some spelling variations:
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
hanh te » hanh tu, hanh ve, hanh de
va hanh » van hanh, va thanh, va danh
ke cau » ket cau
te cua » tue cua, le cua, de cua
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
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) OR (doc sach)) y nang x hoi. hieu ((ve cac) OR (ke cau)) luc va hanh te cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) y nang x hoi. hieu ((ve cac) or (ke cau)) luc va hanh te cua tu~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) y nang x hoi. hieu ((ve cac) or (ke cau)) luc va hanh te cua tu*.