Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chinh chau » chinh cau, chinh cho, chinh phu
chinh can » chinh ca, chinh ban, chinh cau
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
cong san » cong tac
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 can) or (chinh chau))~.
• 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 can) OR (chinh chau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chi)) sach - canh tranh va nhung cong san ((chinh can) or (chinh chau))*.