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 van » trong cac
van toan » van tuan, van tan, van thanh
toan ban » van 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)) dung trong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trinh qua) OR (trinh quan)) dung trong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trinh qua) or (trinh quan)) dung trong van toan ban*.