Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
chua nhung » cua nhung, thuat nhung, cua chung
chua dung » chua dong, thuat dung, chan dung
so thiet » soc thiet, hoc thiet, hoa thiet
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 hien) or (so thiet)) tach - hanh tranh ((chua dung) or (chua nhung)) cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (so thiet)) tach - hanh tranh ((chua dung) OR (chua nhung)) cong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (so thiet)) tach - hanh tranh ((chua dung) or (chua nhung)) cong tac toan ban*.