Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
tam thuong » tam huong, pham thuong, va thuong
tai thuong » tai phuong, tai truong, thi thuong
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 thieu) or (doi chieu)) xanh - hanh trung ((tam thuong) OR (tai thuong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chieu)) xanh - hanh trung ((tam thuong) OR (tai thuong)) cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doi chieu)) xanh - hanh trung ((tam thuong) OR (tai thuong)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) xanh - hanh trung ((tam thuong) OR (tai thuong)) cong tac toan cau*.