Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trong quan » thong quan, tong quan, thong quang
hoc thiet » hoc thieu, hoc thuyet, hoc hien
nhan dang » nhan dan, phan dang, tran dang
luan dung » lan dung, luan dong, luan ung
luan hung » luan chung, lan hung, luan ung
quan doan » quan hoang, chuan doan, chan doan
doan ban » doanh ban, toan ban, doan van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - nhan dang ((luan dung) or (luan hung)) trong quan doan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - nhan dang ((luan dung) OR (luan hung)) trong quan doan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - nhan dang ((luan dung) or (luan hung)) trong quan doan ban*.