Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
xuong dan » huong dan, tuong dan, nguong dan
xuong san » xuong song, cong san, dong san
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan cao, toan ban, toan tap

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 mang) or (nhanh quang)) cua nhung ((xuong dan) OR (xuong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hanh mang) OR (nhanh quang)) cua nhung ((xuong dan) OR (xuong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hanh mang) or (nhanh quang)) cua nhung ((xuong dan) OR (xuong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hanh mang) or (nhanh quang)) cua nhung ((xuong dan) OR (xuong san)) toan cau*.