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
trong tan » trong quan, trong cac, trong ca
tan toan » tan tran, tap toan, van 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 ((trinh qua) OR (trinh quan)) dung trong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trinh qua) OR (trinh quan)) dung trong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trinh qua) OR (trinh quan)) dung trong tan toan cau*.