Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, nhung don
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
hang cong » dang cong, hang nong, bang cong
than tap » toan tap, phan tap, than cap
han tap » han tai, toan tap, nhan tai

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 xanh - hanh tang luan ((nhung cong) or (hang cong)) dan ((than tap) OR (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh tang luan ((nhung cong) OR (hang cong)) dan ((than tap) OR (han tap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh tang luan ((nhung cong) or (hang cong)) dan ((than tap) OR (han tap))*".