Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
quan hanh » quan thanh, quang thanh, quang khanh
luong dan » huong dan, luong dao, tuong dan
luong van » luong va, duong van, luong vat
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh trinh quan hanh ((luong dan) OR (luong van)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh trinh quan hanh ((luong dan) OR (luong van)) toan cau*.