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