Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
thieu sang » chieu sang, thieu khang, thieu quang
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
dan thanh » dang thanh, danh thanh, ban thanh
thanh bac » nhanh bac, thanh bai, thanh san
tuong va » truong va, thuong va, luong va

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 sang - thanh tuong va ((((nhung cong) OR (dung cong))) or (trong cong)) dan thanh bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tuong va ((((nhung cong) OR (dung cong))) OR (trong cong)) dan thanh bac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh tuong va ((((nhung cong) OR (dung cong))) or (trong cong)) dan thanh bac*".