Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh qua » tranh cua, trinh qua, tranh quang
thanh qua » thanh quan, thanh qui, hanh qua
doanh cua » doanh luan
dung cong » dung trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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 thiet tach - canh ((((tranh qua) OR (thanh qua))) or (doanh cua)) dung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - canh ((((tranh qua) OR (thanh qua))) OR (doanh cua)) dung cong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - canh ((((tranh qua) OR (thanh qua))) or (doanh cua)) dung cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - canh ((((tranh qua) OR (thanh qua))) or (doanh cua)) dung cong tac toan ban*.