Perhaps you should try some spelling variations:
khong trong » khoang trong, thong trong, phong trong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua khong » hua khong, cua phuong, cua thuong
trong van » trong cac
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac
doi chi » doi khi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chi) OR (hoc hien)) tinh - hanh tranh cua khong trong van ((than cao) OR (than cap))~.
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (hoc hien)) tinh - hanh tranh cua khong trong van ((than cao) or (than cap))*.