Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
mang luan » tang luan, hang luan, mong luan
bang luan » tang luan, hang luan, dung luan
theo chu » theo chieu, cho chu, chao chu
chu nang » chuc nang, chua nang, cuu nang
cong san » cong tac
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu nang - hanh ((mang luan) OR (bang luan)) ung ((cong san) or (cong thanh)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu nang - hanh ((mang luan) OR (bang luan)) ung ((cong san) OR (cong thanh)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu nang - hanh ((mang luan) OR (bang luan)) ung ((cong san) or (cong thanh)) than cau".
• Adding a wildcard symbol may retrieve word variants: theo chu nang - hanh ((mang luan) OR (bang luan)) ung ((cong san) or (cong thanh)) than cau*.