Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
xtuong dan » xuong dan, huong dan, nguong dan
dang xuan » dong xuan, lang xuan, nang xuan
dung xuan » duong xuan, dung luan, dung quan
tuong dan » huong dan, tung dan, xuong dan
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: theo chieu sach - nhanh ((dang xuan) OR (dung xuan)) trung ((tuong dan) or (xtuong dan)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - nhanh ((dang xuan) OR (dung xuan)) trung ((tuong dan) OR (xtuong dan)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - nhanh ((dang xuan) OR (dung xuan)) trung ((tuong dan) or (xtuong dan)) than cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - nhanh ((dang xuan) OR (dung xuan)) trung ((tuong dan) or (xtuong dan)) than cau*.