Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
hanh trang » thanh trung, canh tranh, hanh trinh
hien hanh » dieu hanh
trang cua » tranh cua, tang cua, trung cua
cua thong » cua thuong, cua khong, cua tong
cong san » cong tac
toan cau » 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 ((thien thanh) OR (hien hanh)) - hanh trang cua thong ((cong san) or (huong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - hanh trang cua thong ((cong san) OR (huong dan)) toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) OR (hien hanh)) - hanh trang cua thong ((cong san) or (huong dan)) toan cau*".