Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
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: ((doi chieu) or (hoc hien)) sang - hanh trinh va thong cong dan ((van ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc hien)) sang - hanh trinh va thong cong dan ((van ban) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc hien)) sang - hanh trinh va thong cong dan ((van ban) or (toan cao))*.