Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
dung huong » dung thuong, dung phuong, dong huong
hoc thieu » toc thieu, hoc hien
nang quan » ban quan, nang suat
tang quan » tang luan, tong quan, thong quan
dan toan » van toan, dan than, manh toan
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 - tinh ((nang quan) or (tang quan)) dung huong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - tinh ((nang quan) OR (tang quan)) dung huong dan toan ban*.