Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, le thanh
te sach » toc sach
va tinh » may tinh
ke cau » ket cau
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
de cua » le cua, te cua, dieu cua
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: te sach y nang x hoi. hieu ((ve cac) OR (ke cau)) luc ((va thanh) OR (va tinh)) de cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu ((ve cac) or (ke cau)) luc ((va thanh) OR (va tinh)) de cua tu~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ((ve cac) or (ke cau)) luc ((va thanh) OR (va tinh)) de cua tu*.