Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
bien quang » dien quang, trien quang, lien quan
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tinh quan » tinh quang, trinh quan, tin quan
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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 ((tinh quan) or (bien quang)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((tinh quan) OR (bien quang)) nhung cong dan toan cau*.