Perhaps you should try some spelling variations:
hung xuong » hung vuong, hung cuong, hung luong
chieu sach » chinh sach, chiet tach, chieu sang
tong quan » thong quan, tong luan, luong quan
xuong dan » huong dan, xuong san, tuong dan
ho chieu » theo chieu, hoc thieu, doi chieu
tang qua » tang quan, tang cua, tang quy
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh ((tang qua) or (tong quan)) hung xuong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((tang qua) OR (tong quan)) hung xuong dan than cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((tang qua) or (tong quan)) hung xuong dan than cau*.