Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trinh quan » tinh quang, trinh luat, trinh han
hoc thieu » toc thieu, hoc hien
trinh qua » trinh cua, trinh quang, trinh luat
hoang van » hang va
cong san » cong tac
toan tap » toan ban

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