Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh luan » tranh luan, thanh xuan, thanh tuan
phung cong » phong cong, nhung chong, dung cong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan 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 khang - thanh luan van ((phung cong) OR (nhung cong)) dan than tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu khang - thanh luan van ((phung cong) OR (nhung cong)) dan than tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - thanh luan van ((phung cong) OR (nhung cong)) dan than tap*.