Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
cong cong » cong dong, trong cong, dung cong
cong canh » cong danh, cong thanh, cong khanh
doc hieu » toc thieu, hoc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
canh van » anh van, can van, cach van
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: ((doc hieu) or (doi chi)) sach - nhanh tinh cua cong cong canh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (doi chi)) sach - nhanh tinh cua cong cong canh van ban.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (doi chi)) sach - nhanh tinh cua cong cong canh van ban*.