Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
tung tran » trung tran, hung tran, huong tran
tran dung » tran dang, tran hung, tran quang
dung cong » dung trong
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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 - thanh tung tran dung cong ((tan toan) or (tap toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung tran dung cong ((tan toan) OR (tap toan)) ban*.