Perhaps you should try some spelling variations:
doan thien » hoan thien, doan thi, toan thiet
ton thien » hoan thien, toan thiet, tran thien
canh manh » lanh manh, canh tranh, cach mang
manh cua » doanh cua, ban cua
cua dong » chua dong, cua cong, cua dang
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ton thien) or (doan thien)) anh - canh manh cua dong ((cong dan) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ton thien) OR (doan thien)) anh - canh manh cua dong ((cong dan) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ton thien) or (doan thien)) anh - canh manh cua dong ((cong dan) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ton thien) or (doan thien)) anh - canh manh cua dong ((cong dan) OR (cong san)) toan cau*.