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