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