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

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoan thien manh - hanh trinh va cong cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoan thien manh - hanh trinh va cong cong san ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoan thien manh - hanh trinh va cong cong san ((toan cao) or (toan tap))*.