Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tang » hanh trang, anh tang, hanh mang
trong dan » trong dang, trong san, trong tan
chu sach » cau sach, thu sach, chuc hach
tang cua » mang cua, hang cua, tang luan
cua ngan » cua ban, vu ngan, cua dan
tong dan » tuong dan, thong dan, cong dan
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: theo ((chu sach) or (chieu sach)) - hanh tang cua ngan ((tong dan) OR (trong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sach) OR (chieu sach)) - hanh tang cua ngan ((tong dan) OR (trong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sach) or (chieu sach)) - hanh tang cua ngan ((tong dan) OR (trong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) or (chieu sach)) - hanh tang cua ngan ((tong dan) OR (trong dan)) toan cao*.