Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dong cong » duong cong, dung cong, dang cong
tinh cua » trinh cua, sinh cua, tinh chat
cua dong » chua dong, cua cong, cua dang

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 cua dong cong ((tinh toan) or (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh tinh cua dong cong ((tinh toan) OR (thanh toan)) cau*.