Perhaps you should try some spelling variations:
dong khoa » duong khoa, dung khoa, dong hoa
khoa hoi » khoan hoi, khoa hoc, khoa doi
tinh voi » trinh voi, tinh doi, binh voi
te sach » toc sach
cuu ban » cuu van, cua ban, cuu san
tinh vi » trinh vi, tinh va, dinh vi
cam cuu » cham cuu, cap cuu
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y dong » ly dong, ty dong, _ dong

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 dong khoa hoi. ((hieu ve) OR (lieu va)) cam cuu ban ((tinh vi) OR (tinh voi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y dong khoa hoi. ((hieu ve) or (lieu va)) cam cuu ban ((tinh vi) OR (tinh voi)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach y dong khoa hoi. ((hieu ve) or (lieu va)) cam cuu ban ((tinh vi) OR (tinh voi)) cua tre*.