Perhaps you should try some spelling variations:
thuyet trinh » thuyet kinh
hoc thuyet » hoc chuyen
phung cong » nhung cong, phong cong, nhung chong
hang luan » tang luan, dung luan
van phung » van phong, van hung, van chuong
dan toan » van toan, manh toan, xuan toan
dan than » ban than, van than, dang thanh
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuyet trinh - hang luan van phung cong ((((dan toan) OR (dan than))) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet trinh - hang luan van phung cong ((((dan toan) OR (dan than))) OR (dan chan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thuyet trinh - hang luan van phung cong ((((dan toan) OR (dan than))) or (dan chan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thuyet trinh - hang luan van phung cong ((((dan toan) OR (dan than))) or (dan chan)) cau*.