Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
tang cua » mang cua, hang cua, thong cua
san toan » van toan, manh toan, xuan toan
dan toan » van toan, dan than, manh toan

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 cua) or (tang luan)) nhung cong ((san toan) OR (dan toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((tang cua) OR (tang luan)) nhung cong ((san toan) OR (dan toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((tang cua) or (tang luan)) nhung cong ((san toan) OR (dan toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((tang cua) or (tang luan)) nhung cong ((san toan) OR (dan toan)) cao*.