Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
anh xquang » anh quan, anh xuan
anh quang » anh quan, nhanh quang, tinh quang
tran hung » tran hong, tran quang, tran hoang
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap

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: mot chieu sach - ((anh quang) OR (anh xquang)) tran hung ((cong tap) OR (cong tan)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "mot chieu sach - ((anh quang) or (anh xquang)) tran hung ((cong tap) OR (cong tan)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: mot chieu sach - ((anh quang) or (anh xquang)) tran hung ((cong tap) OR (cong tan)) toan cau*.