Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
nang quan » ban quan, nang suat
tang quan » tang luan, tong quan, thong quan
cong van » cong vang, song van, cong tan
cong san » cong tac
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 ((cong van) OR (cong san)) 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 ((cong van) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - tinh ((nang quan) or (tang quan)) dung ((cong van) OR (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - tinh ((nang quan) or (tang quan)) dung ((cong van) OR (cong san)) toan ban*.