Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
nhung cong » dung cong, thong cong, hang cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
doi chi » doi khi
chi dan » choi dan, chi van, thi dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi dan - ((hanh tranh) or (hanh trinh)) va nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi dan - ((hanh tranh) OR (hanh trinh)) va nhung cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi dan - ((hanh tranh) or (hanh trinh)) va nhung cong tac toan cao*.