Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
cua nhung » va nhung
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: ho ((hieu lang) or (chieu sach)) - hanh trinh ((cua cong) or (cua nhung)) cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sach)) - hanh trinh ((cua cong) OR (cua nhung)) cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sach)) - hanh trinh ((cua cong) or (cua nhung)) cong san toan cao*.