Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
may thoi » gay thoi, may thi, tay thoi
ky mang » ky nang, ke mang, ky dang
vu sach » vu bach, su sach, vu khach
qua dat » quy dat, qua da, qua dan
quoc va » nuoc va, quoc gia, quoc oai
duoc va » nuoc va, duc va, duoc ma
danh vi » hanh vi, dinh vi, danh di
te sach » toc sach
vi cua » vai cua, di cua

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) OR (vu sach)) ky mang may thoi. hieu qua dat ((quoc va) OR (duoc va)) danh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (vu sach)) ky mang may thoi. hieu qua dat ((quoc va) OR (duoc va)) danh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (vu sach)) ky mang may thoi. hieu qua dat ((quoc va) OR (duoc va)) danh vi cua triet*.