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