Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
toan cao » toan ban
toan tap » toan ban
co sach » bo sach, cuon sach, hoc sach
doi co » doi bo, moi co, hoi co

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi co sach - hanh trinh luat ((nhung cong) or (thong cong)) dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi co sach - hanh trinh luat ((nhung cong) OR (thong cong)) dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi co sach - hanh trinh luat ((nhung cong) or (thong cong)) dan ((toan cao) or (toan tap))*.