Perhaps you should try some spelling variations:
khong cong » khong cang, chong cong, khong con
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
canh manh » lanh manh, canh tranh, cach mang
ho chiet » ho chieu, ho thiet, hoc thiet
manh cua » doanh cua, ban cua
phan dau » hang dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - canh manh cua ((khong cong) OR (thong cong)) thanh ((phan dau) OR (phan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - canh manh cua ((khong cong) OR (thong cong)) thanh ((phan dau) or (phan tu))~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - canh manh cua ((khong cong) OR (thong cong)) thanh ((phan dau) or (phan tu))*.