Perhaps you should try some spelling variations:
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan dung » lan dung, luan dong, luan hung
cong dan » cong san, cong tan, cong dong
toan cau » toan cao, toan ban, toan tap
theo te » theo tieu, theo yeu
theo tu » theo tieu, theo chu, theo yeu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo te) OR (theo tu)) sach - hanh tang luan dung ((cong dan) or (huong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo te) OR (theo tu)) sach - hanh tang luan dung ((cong dan) OR (huong dan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo te) OR (theo tu)) sach - hanh tang luan dung ((cong dan) or (huong dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo te) OR (theo tu)) sach - hanh tang luan dung ((cong dan) or (huong dan)) toan cau*.