Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trinh toan » tinh toan, thanh toan, trinh han
trinh quan » tinh quang, trinh luat, trinh han
thong than » thong thanh, thong phan, thong nhan
hoc thieu » toc thieu, hoc hien
than phan » thanh phan, toan phan, thanh pham

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 - canh ((trinh toan) or (trinh quan)) thong thong than phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh ((trinh toan) OR (trinh quan)) thong thong than phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh ((trinh toan) or (trinh quan)) thong thong than phan tu*.