Perhaps you should try some spelling variations:
khoa chau » khoai chau, khoa phau, khoa cham
tranh cua » doanh cua, manh cua
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
ban chinh » lan chinh, van chinh, hanh chinh
chinh can » chinh ca, chinh ban, chinh cau
ho chu » hoi chu, cho chu, ho chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((khoa chau) or (ho chu)) tinh - canh tranh cua ((hang cong) or (dang cong)) ban chinh can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((khoa chau) OR (ho chu)) tinh - canh tranh cua ((hang cong) OR (dang cong)) ban chinh can.
• Adding a wildcard symbol may retrieve word variants: ((khoa chau) or (ho chu)) tinh - canh tranh cua ((hang cong) or (dang cong)) ban chinh can*.