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