Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dang xay » dang van, van xay
hanh tai » thanh tai, hang tai, han tai
cua viet » ca viet, hoa viet, cua vat
lo dang » lop dang, le dang, xo dang
tu sach » su sach, te sach, tu cach
xay hoi » xa hoi, tay hoi, cay phoi
van cau » van dau, van hau, van chat
tai cua » thai cua, tai cuc, tri cua
thi van » thi lan, thi hanh, thi nang
xuc va » tuc va, luc va, xac va

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: ((thu sach) OR (tu sach)) lo dang xay hoi. thi van cau ((xuc va) OR (duc va)) hanh tai cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) lo dang xay hoi. thi van cau ((xuc va) or (duc va)) hanh tai cua viet~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) lo dang xay hoi. thi van cau ((xuc va) or (duc va)) hanh tai cua viet*.