Perhaps you should try some spelling variations:
thien manh » tien manh, thien anh, thien danh
hanh trinh » canh tranh, hanh chinh
ton thien » hoan thien, toan thiet, doan thien
cong cong » cong dong, trong cong, dung cong
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
toan cao » toan tap
toan ban » van ban
va cong » tai cong, cua cong

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 manh - hanh trinh va cong cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ton thien manh - hanh trinh va cong cong san ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ton thien manh - hanh trinh va cong cong san ((toan cao) or (toan ban))*.