Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban
va dung » van dung, va duong, vat dung
tinh » dinh, kinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((trieu (tinh OR minh)) or (chieu sach)) - hanh trinh va dung cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((trieu (tinh OR minh)) OR (chieu sach)) - hanh trinh va dung cong san toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((trieu (tinh OR minh)) or (chieu sach)) - hanh trinh va dung cong san toan tap*".