Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
tran van » luan van
tap toan » tap quan, bai toan
tap doan » tap quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - hanh tran van nhung cong ((tap toan) or (tap doan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh tran van nhung cong ((tap toan) OR (tap doan)) cau*.