Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
chi sach » chinh sach, chieu sach, co sach
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
chay cao » cay cao, chat cao, nha cao
doi chi » doi khi

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 sach - hanh tranh cua dung ((cong san) or (cong tac)) chay cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - hanh tranh cua dung ((cong san) OR (cong tac)) chay cao.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - hanh tranh cua dung ((cong san) or (cong tac)) chay cao*.