Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
tam duong » tuan duong, thao duong, tam thuong
tam huong » tam thuong, tay huong, nam phuong
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: ho ((nhieu tang) or (hieu lang)) - hanh trung ((tam duong) OR (tam huong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhieu tang) OR (hieu lang)) - hanh trung ((tam duong) OR (tam huong)) cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((nhieu tang) or (hieu lang)) - hanh trung ((tam duong) OR (tam huong)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) or (hieu lang)) - hanh trung ((tam duong) OR (tam huong)) cong tac toan cau*.