Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
dang trong » dung trong, dong trong, lang trong
tieu sach » chieu sach, dien sach, te sach
trong dan » trong dang, trong san, trong tan
cua dang » cua cong, cua ban
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - ((hanh trinh) or (canh tranh)) cua dang trong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((hanh trinh) OR (canh tranh)) cua dang trong dan than cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((hanh trinh) or (canh tranh)) cua dang trong dan than cao*.