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
tang luan » dung luan
hang cong » dang cong, hang nong, bang cong
mang cua » manh cua, dung cua, ban cua
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan 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 xanh - hanh ((tang luan) or (mang cua)) ((nhung cong) OR (hang cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((tang luan) OR (mang cua)) ((nhung cong) OR (hang cong)) tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((tang luan) or (mang cua)) ((nhung cong) OR (hang cong)) tac toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((tang luan) or (mang cua)) ((nhung cong) OR (hang cong)) tac toan cau*.