Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chua dang » chua dong, chua nang, chua xang
chi sach » chinh sach, chieu sach, co sach
cua dang » cua cong, cua ban
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - hanh trinh ((chua dang) OR (cua dang)) cong ((dan than) or (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - hanh trinh ((chua dang) OR (cua dang)) cong ((dan than) OR (dan chan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi sach - hanh trinh ((chua dang) OR (cua dang)) cong ((dan than) or (dan chan)) cao".
• Adding a wildcard symbol may retrieve word variants: doi chi sach - hanh trinh ((chua dang) OR (cua dang)) cong ((dan than) or (dan chan)) cao*.