Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chinh cau » chinh chau, chinh can, chinh tai
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
cong san » cong tac
chinh ca » chinh ta, chinh va, chinh tai
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: ((ho chieu) or (doi chi)) sach - canh tranh va nhung cong san ((chinh ca) or (chinh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chi)) sach - canh tranh va nhung cong san ((chinh ca) OR (chinh cau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chi)) sach - canh tranh va nhung cong san ((chinh ca) or (chinh cau))*.