Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
tuong dan » huong dan, xuong dan, truong dai
mang cua » manh cua, dung cua, ban cua
tung dan » dung dan, huong dan, trung dai
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: hoc ((chieu sach) or (chiet tach)) - hanh mang cua nhung ((tuong dan) OR (tung dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - hanh mang cua nhung ((tuong dan) OR (tung dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (chiet tach)) - hanh mang cua nhung ((tuong dan) OR (tung dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chiet tach)) - hanh mang cua nhung ((tuong dan) OR (tung dan)) toan cao*.