Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
hieu ve » hieu va
cam tuc » cam xuc, cam tu, nam thuc
xay hoi » xa hoi, tay hoi, cay phoi
y dang » ky dang, 2 dang, _ dang
vi cua » vai cua, di cua
cua te » cua tu

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 dang xay hoi. ((hieu ve) OR (hieu van)) cam tuc ((van hanh) OR (ban hanh)) vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y dang xay hoi. ((hieu ve) or (hieu van)) cam tuc ((van hanh) OR (ban hanh)) vi cua te~".
• Adding a wildcard symbol may retrieve word variants: toc sach y dang xay hoi. ((hieu ve) or (hieu van)) cam tuc ((van hanh) OR (ban hanh)) vi cua te*.